Figure 2. Lentiviral vectors for single-cell pooled CRISPR screens.

Direct Pol3 capture vectors can be used to directly recover the functional gRNA in a pooled CRISPR screen. Direct Pol2 capture allows for the direct recovery of the gRNA sequence with a polyA tail matching the functional gRNA. Indirect Pol2 capture allows for the inference of gRNA sequence by capturing a barcoded capture sequence with a polyA tail.