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Showing: 421 - 440 of 1052 results
  1. CRISPR Activation: A Practical Guide

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    Blog Post
    ...example, CRISPR activation has been used to differentiate induced pluripotent stem cells (Chavez et al...neuronal cells by activating genes that cause differentiation and to reverse HIV viral latency (Bialek et...directed towards that gene as there can be a large difference in guide potency. Thus, in cases where users ...cannot be used to study in cis regulation and also suffer from an inability to easily deliver the appropriate...Chavez et al., 2016). To learn more about the different types of Cas9 activators, check out our blog post...DNA sequence or regulating gene expression.     References Behan FM, Iorio F, Picco G, Gonçalves E, Beaver...s41586-019-1103-9 Bialek JK, Dunay GA, Voges M, Schäfer C, Spohn M, Stucka R, Hauber J, Lange UC (2016)...
  2. Plasmids 101: Stringent Regulation of Replication

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    Blog Post
    ...proteins also contribute to this regulation in different ways: methylating newly synthesized DNA, blocking...numbers can allow RepA to link iterons from two different plasmids, forming a pair of “handcuffs” that blocks...RepA proteins form complexes between iterons on different plasmids in a process called "handcuffing," which...Plasmids under stringent control of replication may differ in the specialized proteins or sequences necessary...was updated by Emily P. Bentley in June 2024.  References and resources Further Reading Quiñones-Valles...Replication. IntechOpen. https://doi.org/10.5772/19313 References Asano, K., & Mizobuchi, K. (1998). Copy number...molecular biology help with our Molecular Biology Reference Pages   ...
  3. The Challenges of Cell Culture

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    Blog Post
    ...today. It is now known that nearly 500 cell lines suffer from contamination with HeLa being the most frequent...Down-Regulation of HIF-1α by NDRG2 Expression Attenuates Proliferation and Invasion in Renal Cancer Cells, Marker-independent...the cell lines deposited with them and used by different researchers are free of contamination and match...from this bank. I am often asked, “What is the difference between materials available from commercial repositories...the same cell line from a colleague?”. The main difference is the QC and validation carried out by the commercial...which can be stored in liquid nitrogen long term, preferably some of these vials will be stored in a separate... drug testing. You can find Nick on LinkedIn. References 1. Skloot, Rebecca, and Bahni Turpin. The immortal...
  4. Addgene’s Newest Way to Speed Your Research: The Cloning Grade DNA Service

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    Blog Post
    ...preparative experiments.  We’re excited to begin offering this service to further contribute to our mission...and discovery.” Here are the details. Plasmids offered as cloning grade DNA As we begin testing out this...that this service will be helpful to the many different scientific communities using plasmid tools. Details... We will ship you  2 µg of DNA in 20 µl of Tris buffer suitable for molecular biology experiments such... our Plasmids 101 blog series Learn about the different grades of DNA  Read about the various ways to ...other beta projects Read our Molecular Biology Reference ...
  5. Quick, Versatile Plant Transgenesis with GreenGate Plasmids

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    Blog Post
    ...fragments that are very different.” Because the fragments produced will have different overhangs, they can...enzymes. Now, a new toolkit - aptly named GreenGate – offers all of those same advantages to researchers working...systems. “The cloning is all done in vitro; it’s no different in mouse, human or plants,” explained Jan Lohmann...Lohmann of Heidelberg University. “What is different is the plasmids you use to bring this into your target...available, making it easier for us to do our work.” References 1. Athanasios Lampropoulos et al. "GreenGate ...
  6. Five Popular Model Organisms, Part 2

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    Blog Post
    ...similarities with humans. However, rats have some key differences in physiology, intelligence, and human correspondence... generate transgenic axolotls for an array of different studies. Elly Tanaka’s lab has constructed several...number of offspring (produces many seeds), self fertilizing, a small yet highly characterized genome, and...include understanding of allelic variation between different plant species and metabolic properties affecting... collections to help start your experiments! References: Blount, Z. D. (2015). The unexhausted potential...Zhang, C., & Xing, X.-H. (2018). Pooled CRISPR interference screening enables genome-scale functional genomics...Plasmids Collection Page Read our molecular biology reference Find plasmids for your research ...
  7. An Integrin Antibody Toolkit from IPI

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    Blog Post
    ...research coming out of the lab.  References and resources References Hao, Y., Yan, J., Fraser, C., Jiang...integrins at non-ligand-binding sites and do not interfere with integrin function. Overall, the synthetic...then used these antibodies to show the binding preferences of the αV subunit and its β partners. Of interest...contrast, LVDP-binding integrin α4β1 required and conferred less force, leading cells to spread into symmetrical...antibodies and affinity reagents to study the difference in cell morphology changes induced by integrins...discovered by yeast display reveal αV subunit pairing preferences with β subunits (p. 2024.01.26.577394). bioRxiv...
  8. March for Science

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    Blog Post
    ... science) they come from many different places supporting many different positions. It would be detrimental... and everyone is welcome. Why? There are many different things scientists and non-scientists alike are...not necessarily marching for every cause. The references provided also only provide a snapshot into the...microbial interactions, and science education.       References March for Science Website Locke, John, and Peter...York Times: With Trump in Charge, Climate Change References Purged from Website The Washington Post: Trump...The scientific community: Diversity makes the difference  Association for Psychological Science: Diversity...
  9. Fluorescent Proteins 101: When GFP lets you down

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    Blog Post
    ...purified protein at different acid concentrations. Overviews of the pKa values of different fluorescent protein... GFP variants. Here I use the name ‘GFP’, which refers to mEGFP. This variant was made by introducing ...reduces its size. The substantial size of GFP may interfere with the activity or the localization of the fusion... Another solution to avoid autofluorescence is offered by bioluminescent proteins. These probes generate...C-terminus of another protein. This may, however, interfere with the function of the protein. This is clearly...can follow him on twitter: @joachimgoedhart.   References 1. Zacharias, David A., et al. "Partitioning ...
  10. Multiple Plasmids at a Low Price: Kits from Addgene

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    Blog Post
    .... The plasmids within it contain a variety of different promoters followed by leader sequences (encoding... at the BIOFAB showed that expression of many different genes was predictable based solely on the promoters...or protease sites to remove the epitope tags. Different plasmids in the kit can be used to purify proteins...prokaryotic expression in recent years, with many different systems now available. However, it can be difficult...ORF clones to allow testing and comparison of different cell-free expression systems; the Cell-free expression...bind specific RNA bases. By swapping out these different modular repeat segments, you can create a PUF ...proteins with a wide variety of functions via different fusions. Some applications of PUF protein fusions...
  11. CRISPR 101: Homology Directed Repair

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    Blog Post
    ...this results in the formation of a DNA structure referred to as the displacement loop (D loop). The recombination...when selecting a type of donor. ssDNA templates (referred to as ssODNs (oligodeoxynucleotides)) are commonly... difficult, thus dsDNA plasmids are generally preferred for large insertions such as fluorescent proteins... blog post on Easi-CRISPR for more details. References and resources Want to know more? Check out the...Genome Editing General Homologous Recombination References: Repair of Strand Breaks by Homologous Recombination...their potential to induce chromosomal aberrations. Pfeiffer P, et al. Mutagenesis (2000). PubMed. Multiple...Cas-mediated Transgenesis (2018). Pubmed. CRISPR References: Genome engineering using the CRISPR-Cas9 system...
  12. Using Phosphoserine to Study Protein Phosphorylation

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    Blog Post
    ...however different proteins will likely achieve different levels of incorporation due to differences in stability... further technical reference and protocols for use of this system, please reference ‘Rinehart Lab reagents... length of induction, which will vary between different proteins. Beyond these standard considerations...mitochondrion. You can follow her on Twitter @nieminm.   References 1. Cohen, Philip. "The origins of protein phosphorylation...
  13. X-CHIME: Context Dependent Germline Knockout in Immune Cells

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    Blog Post
    ...However, many genes have different functions in different cell types, at different times, and in combination...T cell responses to cancer.     References and resources References LaFleur, M. W., Lemmen, A. M., Streeter...combination with different genes. Having CRISPR systems for assessing genes in defined contexts would be quite...
  14. IBEX Knowledge-Base: A Data Resource for Multiplex Tissue Imaging

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    Blog Post
    ...shared ownership. Go check it out! References and Resources References Radtke, A. J., Chu, C. J., Yaniv,...mean highly multiplexed: you can image over 65 different parameters using this method (see Movie S8 from...high-quality antibodies and reagents that you know work…preferably before you start your experiment. (And you’re...fluorescent probes, representing imaging from 47 different tissues. Researchers upload and share both their...resources .csv file for easy filtering and sorting. Reference images can be viewed by clicking on the links ...
  15. pSiM24: Simplifying Plant Genetic Engineering

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    ...tumor-inducing” or Ti plasmid, which allows it to transfer genetic material into the host plant genome. Scientists...Scientists have worked to optimize this system for gene transfer, studying the stability of modified Ti plasmids...borders specify the region of DNA that will be transferred to the plant, similar to viral vectors’ terminal...proportional to size, and many plant scientists want to transfer large genes, smaller binary vectors with a larger..., respectively, making it ideal for large gene transfer. The M24 promoter provides constitutive, high-...foundational studies of promoter and gene expression. References Sahoo, Dipak Kumar, Nrisingha Dey, and Indu Bhushan...
  16. PiggyBac-ing Through the Genome Editing Field

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    Blog Post
    ...from a licensed distributor) allow you to quickly transfer a DNA sequence from the transposon vector to one...sequences or mutations behind. Furthermore, piggyBac™ offers a large cargo-carrying capacity (over 200 kb has...line with the piggyBac™ system is that it has a preference for integration at regions of open chromatin,...rearrangement (such as when a stem cell initiates differentiation), transgene silencing may occur (as it would...cassette can be incorporated, and used during the differentiation process. Moreover, a splinkerette-PCR assay...technologies and strategies for their projects. References 1. L. E. Woodard and M. H. Wilson, “piggyBac-...between inverted loxP sites is cytotoxic for proliferating cells and provides a simple tool for conditional...
  17. Antibodies 101: Fc Effector Functions

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    Blog Post
    ...subclass, and are part of the reason why different isotypes drive different types of immune responses. Handily... do so much more than that!    References and resources References Clynes RA, Towers TL, Presta LG, ...immune cells. (psst! Need a quick review of the different immune responses? We got you! You can also review...receptors; and so on and so forth. There are a lot of different receptors, but their downstream effects can be...
  18. RUBY-Red Siliques

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    Blog Post
    ...microscopy and beautiful imaging. References and Resources References  He, Y., Zhang, T., Sun, H. et al...killing the untransformed seedlings or callus (undifferentiated plant cell culture), which is great for a ...such as cacti and beets. Betanin belongs to a different chemical family than the red/purple plant pigments...left) Mature silique (Arabidopsis fruit) with fertilized developing seeds from a homozygous RUBY plant...(Bottom panels) RUBY expression can vary from different transformation events likely due to insertional...
  19. A Tour of Addgene's Most Popular Pooled Libraries

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    Blog Post
    ...thousands or millions of different books. Addgene’s pooled libraries are a little different: each is a collection...collection of plasmids that share the same backbone and differ only in a small region. This makes them useful ...Pooled libraries can be designed for all kinds of different high-throughput experiments. Our most popular ...plasmid DNA. In addition, several libraries are offered as lentiviral preparations to save you a few steps... look under “Ordering” to see what options are offered. Figure 4: Screenshot of the Addgene website...
  20. Why Add Sucrose? Improved Yields for Adeno-associated Virus Preparation

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    Blog Post
    ...redesigning viral packaging plasmids, investigating different viral production strategies or developing novel... already a common excipient in AAV formulation buffers, this sugar may be a more attractive choice for...silver stain approaches we show that there is no difference in purity or infectivity between the untreated...GFP-expressing AAV particles we did not observe any difference between untreated and sucrose treated cells. ...it will be exciting to test this approach with different capsids. Most importantly, because our AAV yields...providing new materials to the research community. References 1. Coroadinha, A. S., et al. "Effect of osmotic...
Showing: 421 - 440 of 1052 results