...when to apply selection, when to sequence, and how to analyze the results. Positive screen: Apply library... Negative screen: Apply library Perform NGS on a control sample (no selection) Apply selection; most cells...semi-random or random sequences that can be used for applications like lineage tracing, drug screening, and gene... guessed from their name, pooled libraries are supplied as a mixed population of plasmids in a single ... screens follow the same basic process. Before applying to cells, the library must be amplified (electroporation...library Apply selection, most cells die or do not pass selection (in the case of a reporter) Sort selected...