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  1. Summer SciComm Series: Cognitive Load

    Type
    Blog Post
    ...bandstands: cognitive load.  Cognitive load The Wikipedia definition of cognitive load states: “cognitive load...resources. There are three types of cognitive load: intrinsic cognitive load is the effort associated with...with a specific topic; extraneous cognitive load refers to the way information or tasks are presented to... to a learner; and germane cognitive load refers to the work put into creating a permanent store of knowledge... (a schema).”  In scicomm, I like to think of cognitive load as the amount of mental thought and effort...s quite easy (and common!) to be blind to the cognitive load you’re placing on your audience when you'...enthusiastic of learners.  What contributes to cognitive load?  Everything! Here are some common areas ...
  2. Protocol - How to Perform a Diagnostic Digest

    Type
    Protocol
    ...naturally occurring bacterial endonucleases that recognize a large range of DNA sequences. Given the variety...variety of these enzymes and the unique sites they recognize, restriction digests have become the most widely...
  3. Antibody Guide

    Type
    Collection
    ...capable of recognizing and binding to epitopes on antigens, they are also capable of recognizing and binding...source secondary recognizes], e.g. , “goat anti-rabbit.” Choose a secondary that recognizes your primary ...proteins, naturally produced by the immune system to recognize and bind foreign bodies. Antibodies can be used...proteins of interest. The protein that an antibody recognizes is called an antigen, while the specific binding... probability that an antibody will be able to recognize and bind to any given antigen. A mature B cell...specificity in antibody-based methods. Antibodies can recognize and bind other antibodies using epitopes present...important to choose a monoclonal antibody that will recognize an available epitope on your protein of interest...
  4. TALEN Guide

    Type
    Collection
    ... of a zinc finger (ZF) nuclease. Zinc fingers recognize triplets and the FokI nuclease operates as a dimer... the ZF nuclease, the components of the array recognize individual nucleotides. For over ten years, zinc...identified a large number of zinc fingers that recognize various nucleotide triplets. With some trial and... and error, ZF arrays are able to recognize their targets with fairly high specificity. Fifteen years ...Iowa State University published the nucleotide recognition code of the TAL effectors, which were isolated...which single nucleotide the TAL effector will recognize: ( Figure 1B ) HD targets cytosine, NI targets...
  5. Genetic Code Expansion

    Type
    Collection
    ...codon (typically the amber codon) that is recognized by the cognate charged tRNA. Once these plasmids have... an aminoacyl-tRNA synthetase (aaRS) loads its cognate tRNA with a specific amino acid. Then, the tRNA...figure below: A plasmid expressing the tRNA and its cognate aminoacyl-tRNA-synthetase (aaRS) that has been ... codons, have also been utilized. A tRNA that recognizes this codon. An aminoacyl-tRNA synthetase to load...plasmids also contain one or more copies of the cognate tRNA gene. ID Plasmid Synthetase Origin ncAA Expression...
  6. CRISPR Guide

    Type
    Collection
    ...regions, as it recognizes TTTV (V = A, C, or G) PAM sites. Engineered versions of Cas12a recognize different... mutations in multiple domains to expand PAM recognition, increase specificity, and decrease off-target...Faecalibaculum rodentium ) has increased fidelity, and recognizes NNTA, a PAM sequence often found in plants, expanding...mechanisms, including blocking crRNA loading or PAM recognition; inhibiting Cas9’s endonuclease domain; or inducing...EnCas12a, an engineered version of AsCas12a that recognizes TYCV and TATV PAM sites. The DETECTR platform...using Cas13 Cas13 is a type VI CRISPR enzyme that recognizes ssRNA. Type VI enzymes, which include Cas13a ...crRNA precursors to mature crRNAs. Upon ssRNA recognition by the crRNA, the target RNA is degraded. In ...
  7. Fujii Lab CRISPR Plasmids

    Type
    Collection
    ...iChIP, specific genomic regions tagged with the recognition sequences of an exogenous DNA-binding protein...pCMV-7.1 Expresses a 3xFLAG-tagged TAL protein recognizing a telomere repeat 63590 3xFN-Tel-TAL/pMXs-puro...pMXs-puro Expresses a 3xFLAG-tagged TAL protein recognizing a telomere repeat. A retroviral expression vector...pMXs-neo Expresses a 3xFLAG-tagged TAL protein recognizing a telomere repeat. A retroviral expression vector...
  8. Immunology Research Plasmids and Resources

    Type
    Collection
    ... gfg, gfg-1 OGFR opioid growth factor receptor - OGN osteoglycin DKFZp586P2421, OG, OIF, SLRR3A OPRD1 ...triggers several processes to activate cells to recognize and get rid of infectious pathogens. The innate...immunity. Once an adaptive immune cell is primed to recognize a specific antigen, it finds and attacks pathogens...expand and give rise to memory cells that can recognize a recurrent infection and rapidly initiate a secondary...The cornerstone of the immune response is the recognition by T cells of foreign antigens on the surface...presenting cells. B cells in secondary lymphoid organs recognize specific antigens through the B cell receptor ...Engagement of the TCR by an MHC molecule presenting its cognate antigen along with co-stimulation activates the...
  9. Deisseroth INTRSECT Collection

    Type
    Collection
    ...placing two orthogonal recombinase (Cre and Flp) recognition sequences within synthetic introns. INTRSECT ...) of a molecular tool and adding recombinase recognition sequences (e.g. Lox sites, FRT sites) inside ...introns (A,D). The addition of these recombinase recognition sequences enables directional control of the ...
  10. Ligation Independent Cloning

    Type
    Protocol
    ...which cut at a specified distance from their recognition sequence. This can create multiple distinct overhangs...
  11. mTOR Pathway

    Type
    Collection
    ...key metabolic regulator, correlates with poor prognosis in many cancers.... either mTORC1 or mTORC2 correlates with poor prognosis in many cancers, including breast, colon, ovarian...
  12. Cre-lox system

    Type
    Collection
    ... gene expression. The protein Cre recombinase recognizes 34 bp loxP sites, and the orientation and location...and SCre are alternative Cre recombinases that recognize specific mutant loxP sites, VloxP and SloxP sites...the control of gene expression. Flp recombinase recognizes FRT sites. Flp binding to these sites can result...
  13. CRISPR Plasmids - RNA Targeting

    Type
    Collection
    ... rather than DNA. In bacteria, once they have recognized and cleaved the target RNA sequence, they adopt...
  14. Institute for Protein Innovation

    Type
    Collection
    ...developed recombinant versions of antibodies that recognize common epitope tags to help purify, detect, or...
  15. Antibody Production

    Type
    Collection
    ...in-house or through outside labs, to confirm recognition of the expected target or to confirm expected...
  16. CRISPR Plasmids - Bacteria

    Type
    Collection
    ... rather than DNA. In bacteria, once they have recognized and cleaved the target RNA sequence, they adopt...
  17. Open Enzyme Collection

    Type
    Collection
    ...Eco31I 165507 pOpen-NotIR (GC) NotI (GC-rich recognition site) 165508 pOpen-HindIIIR HindIII 165526 pOpen-PstIR...
  18. Rett Syndrome

    Type
    Collection
    ...Age of diagnosis in Rett syndrome: patterns of recognition among diagnosticians and risk factors for late...
  19. A Needle in a Base-Stack: Cas9 Structural Biology

    Type
    Blog Post
    ...lobes and helps recognize the guide RNA. Unlike the cleavage domains, the recognition domains—including...strand CTD (or PI) Recognize PAM REC REC I, II, and III Recognize guide RNA Bridge helix....   DNA sequence recognition Once primed by RNA loading, the PAM-recognition residues in the CTD can...lobes, called NUC (for nuclease) and REC (for recognition). The NUC lobe contains the DNA scissors: the...to the NUC lobe. Because its primary role is recognizing the PAM on DNA, the CTD is also sometimes called... book (Figure 2). The portion of the CTD that recognizes the PAM is so flexible in this state that it ...structure (Figure 2) at all. When this crucial recognition region is disordered, Cas9 binds DNA very weakly...
  20. Antibodies 101: Introduction to Antibodies

    Type
    Blog Post
    ...antibody does not recognize the entirety of the target protein: instead, it recognizes a small portion ...of more robustly recognizing the target protein because the antibodies will recognize multiple epitopes...antibody, which recognizes your protein of interest, and a secondary antibody, which recognizes the primary...light chain determine what antigen the antibody recognizes and binds to.   Figure 1: Labeled diagram...may contain many epitopes that antibodies can recognize. Imagine you’re doing a word search puzzle. You...the word you’re searching for. Antibodies may recognize a linearized sequence of amino acids, or only ...with the antigen that you want the antibody to recognize. This triggers an immune response within the animal...
  21. Antibodies 101: Polyclonal Antibodies

    Type
    Blog Post
    ...heterogeneous mixture of many antibodies that recognize the same protein. In the immune system, antibodies...individual B cell produces antibodies that all recognize the same region, or epitope, of the target protein...system make different isotypes of antibodies that recognize many different epitopes of the target protein.... can be performed to isolate antibodies only recognizing your protein of interest: affinity-purified antibodies...containing the target protein, and any antibody recognizing the target protein remains bound to the column...using pre-adsorbed secondary antibodies (which recognize other antibodies) in experiments that require ...population that is enriched for antibodies that recognize your target protein without causing high background...
  22. Antibodies 101: Monoclonal Antibodies

    Type
    Blog Post
    ...produced. Because of this, all of the antibodies recognize a single epitope on the target molecule. Although...this blog post we’ll focus on antibodies that recognize proteins. Figure 1: Steps in the generation...to make sure that you choose an antibody that recognizes an epitope far from the ligand binding site (... (Mould et al., 2016). If your antibody recognizes a part of your protein that may be masked while the... a false negative signal - the antibody can’t recognize the protein even though it is present in your ...proteins. This is because monoclonal antibodies recognize a single epitope, so it’s less likely that this...are a heterogenous mixture of antibodies that recognize many different epitopes on the same protein - ...
  23. Plasmids 101: Golden Gate Cloning

    Type
    Blog Post
    ...enzymes in that they cleave outside of their recognition sequence, creating four base flanking overhangs...overhangs. Since these overhangs are not part of the recognition sequence, they can be customized to direct assembly... DNA fragments. When designed correctly, the recognition sites do not appear in the final construct, allowing...because this construct does not retain the enzyme recognition sites. As a result, the ligation process is close...desired order of fragments, and the loss of enzyme recognition sites after ligation favors formation of the ...ability of Type IIS enzymes to cut outside their recognition site and permits DNA fragments with compatible...assembled. Scientists can engineer unique enzyme recognition sites that flank their DNA fragment in an inverse...
  24. Recombinase-based State Machines Enable Order-dependent Logic in vivo

    Type
    Blog Post
    ...large serine recombinase that recognizes its own attB and attP recognition sites on the register and catalyzes...re-orienting their recognition sites, or by excising one or multiple of their recognition sites from the ... same recognition site array on the register, and all three-input GRSMs use the same recognition site ...the registers. All parts used in this paper (recognition sites, terminators, promoters, and genes) were...to idiosyncrasies that arise when all parts (recognition sites, promoters, genes, terminators, etc) are...
  25. Of Myc and Men

    Type
    Blog Post
    ...C-terminal antibodies only recognized the human c-Myc protein and did not recognize the mouse or chicken homologs...which turned out to be critical for antibody recognition. As such, the peptide could only be added to ...other species, suggesting that these antibodies recognize an epitope within that region. You’ll notice that...Pelham, 1987). They narrowed down the epitope recognized by Myc1-9E10 down to 10 amino acids (EQKLISEEDL...tag, they found that the Myc epitope could be recognized by its antibody without additional chemical modification...antibody 9E10 displays highly variable epitope recognition dependent on neighboring sequence context. Sci...
  26. Antibodies 101: Epitope Availability

    Type
    Blog Post
    ...hides the epitope that the antibodies used to recognize the protein, your antibody will no longer be effective... issue with monoclonal antibodies, which only recognize one epitope. (It can sometimes be an issue with... for flow cytometry, for example, can only be recognized by antibodies that bind to the epitopes that ...some assays, you may only need to validate for recognizing the protein following your sample prep steps;... for others, you may need to validate that it recognizes the protein of interest in specific configurations...conditions to understand exactly what your antibody recognizes.  Understanding how the available epitopes in...
  27. Plasmids 101: Methylation and Restriction Enzymes

    Type
    Blog Post
    ...DNA sequences and companion endonucleases that recognizes and cleave the same DNA sequence if not methylated...strains such as DH5alpha contain 3 methylases that recognize and methylate different stretches of DNA: Dam...be blocked due to methylation if the enzyme's recognition site (TCTAGA) is preceded by GA or followed by...As shown in the figure below, a Dam methylase recognition site (underlined in red) overlaps with the XbaI...enzymes such as DpnI require methylation at their recognition sites in order to efficiently cleave DNA. DpnI...enzymes commonly used in the lab do not have recognition sites that could overlap with a methylation site...
  28. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ... ZFNs, but instead of recognizing nucleotide triplets, the components recognize individual nucleotides...These proteins are characterized by large DNA recognition sites, which makes them highly specific.  Jurassic...recombination with a repair template.  Each zinc finger recognizes a nucleotide triplet and when several ZFNs are...CRISPR  CRISPR The strategy of using a protein to recognize DNA sequences is not ideal. For the early generation...generation gene editors, new amino acid recognition sites had to be designed each time we wanted to target...
  29. Cancer and the Immune System: Deciphering the Relationship

    Type
    Blog Post
    ...metastasis. Evading Recognition Tumor cells over-express CD47 to escape recognition by circulating macrophages...nomenclature. 1. Eliminate - Latent tumors are recognized by effector cells of the immune system - cytotoxic...Suppressing function, creating tolerance, and evading recognition are a few methods by which tumors sidestep immune... class I proteins on their surfaces to avoid recognition by CD8+ T cells. Existing therapies and effects...times. These engineered T cells are capable of recognizing targets like CD19 on tumor cells and exhibit ...
  30. Plasmids 101: Cre-lox

    Type
    Blog Post
    ...bacteriophage: the Cre recombinase and a loxP recognition site. The P1 bacteriophage uses these components...and inter-molecular recombination at the loxP recognition sites. A key advantage of the system is that ...cross)-over in P1) sites are 34-base-pair long recognition sequences consisting of two 13-bp long palindromic...13bp repeat sequences on a single loxP site are recognized and bound by a Cre protein, forming a dimer. ..., with flippase (Flp) and the short flippase recognition target (FRT) site being analogous to Cre and ...
  31. Antibodies 101: ELISA (Enzyme-linked Immunosorbent Assay)

    Type
    Blog Post
    ...also recognizes the same target protein. The capture antibody and the detection antibody recognize different...detect proteins for which multiple antibodies that recognize different epitopes are available; this type of...pre-incubated with a known amount of an antibody that recognizes it, while the bottom of the wells are coated ...to characterize properties of an antibody that recognizes that protein, while coating the wells with an...
  32. xCas9: Engineering a CRISPR Variant with PAM Flexibility

    Type
    Blog Post
    ...directed evolution to create xCas9, an enzyme recognizing a broad range of PAMs like NG, GAA, and GAT, ...sequences adjacent to a protospacer. If ω-dCas9 could recognize a library PAM, it would induce transcription of...pool. According to this logic, ω-dCas9 variants recognizing multiple PAMs should have a fitness advantage...advantage over proteins with single PAM recognition. Created with BioRender.com. After 24 days of ...resistance. xCas9 3.7 showed the broadest PAM range, recognizing NG, NNG, GAT, and CAA PAMs, while xCas9 3.6 displayed...
  33. Plasmids 101: Protein tags

    Type
    Blog Post
    ...Table 2: Protease recognition sites commonly used with tags Protease Recognition site Notes TEV...requiring the addition of an independent cleavage recognition site. In fact, SUMO cannot be used in eukaryotes...FLAG tags can be cleaved by enterokinase, which recognizes DDDDK^X, cleaving after the lysine. The efficiency...but scientists would need to incorporate their recognition sites into their protein tag in order to use ...
  34. Mesothelioma - Causes, Symptoms, and Treatment

    Type
    Blog Post
    ... mesothelioma patients have an extremely poor prognosis. Together, the cause, long latency period, and...the best ways to improve the traditionally dire prognosis for mesothelioma patients is to catch the disease...mesothelioma much earlier, thus improving the patient’s prognosis significantly, but also to monitor those who may...pembrolizumab (Keytruda) causes T-cells to more easily recognize and cause the destruction of cancer cells. Pembrolizumab...historically been full of bad news and dreadful prognoses. Survival rates for mesothelioma are creeping ...
  35. Using Phosphoserine to Study Protein Phosphorylation

    Type
    Blog Post
    ...required for translation (Figure 1): A tRNA that recognizes a specific ‘open’ codon and utilizes this triplet...includes 4 copies of a tRNA that specifically recognizes amber stop codons (TGA) to encode phosphoserine...strain, C321.ΔA. Because the phosphorserine OTS recognizes the TAG amber stop codon, using the OTS in an...is an ‘open’ codon, which can be specifically recognized by the Sep-tRNA. 3. An expression plasmid encoding...mutagenesis. In the C321.ΔA strain, this TGA will be recognized by Sep-tRNA and translated with a specific phosphoserine...
  36. 28 Hot Plasmid Technologies from 2015

    Type
    Blog Post
    ... specifically, cognate peptide epitopes fused to the protein of interest are recognized and thus fluorescently...Cas9 protein is composed of an n-terminal DNA recognition domain and a mostly c-terminal nuclease domain...dCas9 is fused to a scaffold containing epitopes recognized by scFV antibodies fused to VP64 transcriptional...phage integrases which act irreversibly on their cognate attB/attP sites with no cross-talk. These pairs... plasmid or in various combinations, while the cognate att sites are supplied as individual reporter constructs...chromosome shattering. This method is based on the recognition of genomic loci by three orthogonal nuclease-...gene editing in human cells without cross-talk in cognate sgRNA binding. By fusing these dCas9s with one ...
  37. Antibodies 101: Avoiding the Mouse on Mouse Mess in IHC

    Type
    Blog Post
    ...antibody are present, your secondary antibody recognizes both the endogenous IgGs and your primary antibody...the tissue with unconjugated Fab fragments that recognize the endogenous IgGs (Lu and Partridge, 1998). ...secondary antibody since 1) your secondary should not recognize Fab fragments from the same species and 2) these... likely to bind (and block) the same epitopes recognized by the secondary.   Figure 2: There are...
  38. Antibodies 101: Choosing the Right Isotype

    Type
    Blog Post
    ...antibodies. Some secondary antibodies are broad and recognize multiple isotypes from a species, like a general...general anti-mouse antibody. Others recognize specific isotopes within that species, like an anti-mouse IgG...only a fraction of the antibody molecules will recognize and bind to your primary antibody. Manning et ...example, some goat anti-mouse secondary antibodies recognize some rat primary antibodies (Erickson 1993). It...
  39. Bacterial Toxin-antitoxin Systems as Molecular Biology Tools

    Type
    Blog Post
    ... specific nucleotide sequences, preventing the cognate restriction enzyme from cleaving the DNA. A role...regulated by antisense RNA, which base pairs to cognate mRNA to inhibit its translation. The hok/sok system...resulting in a double stranded RNA structure that is recognized and cleaved by RNaseIII resulting in cell survival...MazF complex: molecular bases of antidote-toxin recognition." Molecular cell 11.4 (2003): 875-884. PubMed...
  40. Deep Mutational Scanning with One Pot Saturation Mutagenesis

    Type
    Blog Post
    ...(ExoIII) (step 4). UDG recognizes uracils that are in DNA and ExoIII recognizes nicked duplexed DNA. This...enzymes. These enzymes, Nt.BbvCI and Nb.BbvCI, recognize the same restriction site, but nick opposite strands...the DNA strand that contains their respective recognition site. This means that if the BbvCI enzyme used...
  41. Transferable Skills Guide: Conflict Resolution

    Type
    Blog Post
    ...approach to conflict resolution, it’s important to recognize that there are different types of conflict. Most...can fall into “groupthink” and fail to evolve. Recognizing when “bad” conflict can be spun into “good” conflict...you find someone annoying or disagreeable, you recognize their feelings as valid. Listening: In one of ...management skills. It’s also completely OK to recognize that conflict resolution may never be a strength...
Showing: 1 - 50 of 258 results