We designed a CRISPR library containing 4,993 sgRNAs targeting 1,157 previously reported cell surface genes (13 (link)), 49 core essential genes, and 49 nonessential genes. Each oligo (77 nt) contained 20 nt sgRNA, a 5′ universal flanking sequence (CTTGTGGAAAGGACGAAACACCG), and a 3′ flanking sequence (GTTTTAGAGCTAGAAATAGCAAGTTAAAATAAGG). The oligo library was synthesized by CustomArray Inc. The sequences of the sgRNAs are provided in Dataset S1. The McspKO library was amplified and cloned into lentiCRISPRv2 plasmids using Gibson Assembly Reaction Master Mix (NEB, E2611S).