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...by guest blogger Alan Wong. The complexity of biological systems can hinder our attempts to study and ...combinatorial genetic networks underlying your favorite biological phenotype in a scalable way. This blog post will... genetics that underlie complex regulation in biological systems. The CombiGEM platform provides a means...sequences via oligo synthesis using the format indicated below and pool-clone them into the pAWp28 storage...realization of a variety of perturbations and applications in functional genomics, cell reprogramming, ...currently an Assistant Professor at the School of Biomedical Sciences of the University of Hong Kong. He is...technologies to interrogate and understand complex biological systems. He can be contacted at [email protected]. ...

...As evidenced by all the CRISPR publications, press, and plasmids out there, it’s obvious that CRISPR ... Not only is CRISPR having effects on various biological disciplines, the base technology itself is constantly... the Broad Institute, the Joung lab at Harvard Medical School, and the Doudna Lab at Berkeley set out ...afforded by gRNA binding at non-target sites would theoretically decrease off-target cutting. Figure 1...PubMed PMID: 26628643. Find plasmids from this publication at Addgene. 2. Nishimasu, Hiroshi, et al. "Crystal...PubMed PMID: 26735016. Find plasmids from this publication at Addgene. 5. Chen, JS, et al. "Enhanced proofreading...PubMed PMID: 28931002. Find plasmids from this publication at Addgene. Resources on the Addgene Blog Read...

...spacer "NNNTANNN", where "N" indicates which bases may vary from the canonical sequence. Among these are ...important plasmid elements – promoters, origins of replication, protein tags, and antibiotic resistance markers...creating (excuse the pun) specific, targeted DNA modifications in transgenic animals, embryonic stem cells,...proteins or co-factors, thus allowing for broad applications in a variety of experiments. LoxP (locus of ...sequence gives the loxP site directionality, and the canonical loxP sequence is ATAACTTCGTATA-GCATACAT-TATACGAAGTTAT... the loxP methods described above, a genetic modification can be restricted based on experimental constraints...

...are time-consuming, have been typically optimised for immortal/genetically-corrupt cell lines, lack scalability...alone in the cellular milieu. It is, therefore, critical to understand how proteins interact with one another... another (or with DNA) to perform diverse biochemical tasks in the cell. One of the most popular approaches... to tag the protein of interest with a small biochemical “epitope tag” such that these tagged proteins... purchased from various other suppliers with a typical turnaround time of 5-7 days. The crRNA and tracrRNA... to tag >30 genes/plate in the first shot with typical knock-in efficiencies of 10-20%. Together, our ... the non-HDR allele. For N-terminal tagging, specifically searching for error-free knock-in at both alleles...

...methyltransferase DNMT3A allows researchers to easily add biochemical marks to genetic regions from which where they...approach (spoiler alert: it’s dCas9… with no modifications). Ready to get started?   Figure 1:...eventually, develop treatments, we need tools to specifically edit methylation sites.  Step aside, transcriptionally... DNA. When dCas9 is bound to a target CpG, it physically blocks DNMT1 from that site. So, when DNMT1 methylates... methylates the genome during DNA replication, it doesn’t methylate sites blocked by dCas9. Within a few...Szyf 2021.   Let me leave you with a few practical considerations: Design your gRNA to overlap the...for dCas9 to interfere with DNMT1 even through replication. The dCas9 also needs to be removeable, otherwise...

...process involves a significant amount of QC. First, we perform Picogreen quantification on each and every... preparation process and includes Picogreen quantification of various intermediate steps, a sizing electrophoretic...electrophoretic gel, and qPCR quantification of the final libraries. A broader view of the whole plasmid...often find a few mismatches in the origin of replication or other common backbone elements. Since we’ve...annotated Genbank files that are useful for more complicated plasmids, like those that contain synthesized...sequence or plasmids containing genes with many modifications. We look for point mutations, truncations, and...

...ago. I just recently started working in the pharmaceuticals industry after earning my Master’s in 2016 ...accomplishments and demonstrate your science communication skills. Know your audience. Connect your prior...presentation as an opportunity to demonstrate technical and transferable skills that make you qualified...perfect science talk Be prepared for potential technical difficulties. Have your presentation on a flash...codes for interviews. You can also ask HR for clarification on the dress code for the interview. Greet each... quiet place to take your video call.  Expect technical difficulties. To try and circumvent this, test...from HR carefully. And even if you don’t have technical challenges, your interviewers might.  You’ll probably...

... from E.coli, named TadA7.10 in ABE7.10)  a catalytically impaired Cas protein (dCas or Cas nickase)  ...accidental insertions and deletions (indel) by the catalytically impaired D10A nickase from ABE7.10 can be a ...the authors created ABE8 constructs using a catalytically “dead” S. pyogenes Cas9 (dC9-ABE8.x-m/d). The...even in adult patients. In order to analyze the clinical use of ABE8 for primary human cell editing, the... reduced off-target editing frequencies. For applications that require high DNA editing specificity, for...deamination, an important attribute for therapeutic application. ABE8s demonstrate an overall improved base editing...editors with increased activity and therapeutic application. Nature Biotechnology. https://doi.org/10.1038...

... Roska’s lab at the Institute of Molecular and Clinical Ophthalmology Basel recently took a different ...Strategy #2 (ProB): Create promoters using phylogenetically conserved sequences that are upstream of the...expression. Surprisingly, <1% of synthetic promoters replicated the expression specificity of the wild-type promoters...reproducibly labeled retinal cells can be found here.  Applications for synthetic promoter AAVs Besides restricting...synthetic promoters have a few other potential applications: Using promoter combinations for targeted expression... promoters expressed in. The lab tested this application using one promoter to drive expression of Cre-mCherry... rates of labeling are ideal of gene therapy applications, promoters that produce sparse labeling would...

...named according to the number of strands in the canonical beta-barrel structure. Most frequently, the proteins...pairs with N173 derived from Cerulean or Venus Identification of new fluorescent protein fragments for bimolecular...fluorescence complementation analysis under physiological conditions. Shyu et al. Biotechniques. 2006 ...fluorescent proteins for protein labeling and signal amplification. Zhou et al. PLoS One. 2020 Bo Huang Yellow...Yellow Venus pBiFC-VN173, pBiFC-VC155 Identification of new fluorescent protein fragments for bimolecular...split-FP options. While the BiFC interaction is typically irreversible and requires some time for chromophore...