Guest Blogger

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A heatmap showing on-target activity of SpCas9 variants against various targets, with WT-like cleavage indicated by green, no cleavage indicated by red, and intermediate cleavages in middle shades of yellow-green, yellow, and orange. The variants are ranked by activity and the targets are ranked by cleavability, with the result that the top-left corner (high activity, high cleavability) is green to show high cleavage, the bottom right corner (low activity, low cleavability) is red to show no cleavage, and an approximate staircase pattern divides the two colors. In each row, a miniaturized graph of off-target cleavage, normalized from 0 to 1, is shown. In general, these graphs show declining off-target cleavage among SpCas9 variants of lower activity. In each row, representing a particular target, one cell of the heatmap has been outlined in black to emphasize it as belonging to the target-matched variant. Each target-matched cell is the last in its row to show moderate yellow-green color rather than an orange color, indicating some on-target cleavage activity. Each target-matched variant has very low off-target cleavage.
A protein structure of ABE8e is shown, superimposed with cartoon representations of sgRNA and target DNA. Two TadA domains are highlighted. The catalytic domain contacts multiple bases of the non-target DNA strand, while the docking domain primarily contacts the other protein domains.
A schematic showing different functionalities possible with Click Biology.
Schematic representation of a TnpB genome editor.
A cartoon depiction of a lentiviral genome forming an episome in the presence of non-functional LV integrase. The linear lentiviral genome has a long terminal repeat (LTR) on each end. A split arrow shows two paths for circular episome formation. Homologous recombination within the LTRs results in a single LTR in the circular episome. Non-homologous end joining results in two adjacent LTRs in the circular episome.

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