Combining superresolution microscopy with CRISPR-Cas9 genome editing, researchers from Abby Dernburg’s group at UC Berkeley describe a method for building three-dimensional models of the synapsed chromosome axis in C. elegans. Using Alt-R ribonucleoprotein RNP complexes rather than conventional expression plasmids, they report 50-fold improvement of editing efficiency, as measured by the percentage of F1 progeny positive for co-injection markers.
Researchers at the Geisel School of Medicine at Dartmouth describe an expression-free method of CRISPR-Cas9 genome editing in three non-albicans Candida species using Alt-R Cas9 nuclease and guide RNAs. In this publication, Grahl et al. describe the challenges of using exogenously-expressed Cas9 and gRNAs in these species, and how the use of RNA-protein complexes (ribonucleoprotein) can be used to overcome this obstacle, expanding the potential for CRISPR-Cas9 genome editing to a wider range of fungi species.
The authors create DNA origami nanostructures that undergo light-induced conformational changes. Two linked 14-helix origami bundles form a chiral object with a tunable angle. A photo-responsive, azobenzene-modified DNA segment is added to the template and upon illumination, is converted to a cis-form, altering the angle of the bound origami bundles.
The authors identify a previously unknown stimulatory mechanism (through RAD51 paralog proteins) for homologous recombination--filament remodeling. They use DNA origami nanostructures to elucidate the mechanism by which RAD51 paralogs enhance homologous recombination.
The authors used gBlocks® Gene Fragments to generate a standard curve for their qPCR analysis.
This research team used candidate aptamers in an enzyme-linked aptamer sorbent assay (ELASA) to detect human insulin-like growth factor-I, a biomarker for recombinant human growth hormone, used in athletic doping.
The authors used gBlocks® Gene Fragments to generate a standard curve for their qPCR analysis.