...gain-of-function screens, enhancer/promoter mapping, and variant effect mapping studies. You can learn more about...epitope mapping, protein engineering, and ligand discovery. The key advantage of this approach is the ...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...loss-of-function screens, in vivo mutagenesis, pathway mapping, and drug resistance studies. Advantages Broad ... in postivie or negative screens. The use of appropriate controls (positive and negative) is the responsibility...