title: GSM3267237: U5_NPC_Retest_Day21_R1; Homo sapiens; OTHER
library_construction_protocol: Cells were harvested at Day 0 post-selection and at the final timepoint and DNA was extracted using DNA Blood Mini Kit (Qiagen). Guides were PCR-amplified and sequencing adapters for standard Illumina sequencing and sample indices for multiplexing were attached through two rounds of PCR.