Following mock infection as well as infection by both ts SeV-Cas9 targeting mCherry and ts SeV-Cas9 targeting CCR5 we see similar ratios of colony formation within a single donor between CFU-E, CFU-G, CFU-GM, CFU-GEMM, BFU-E, and CFU-M although there are some differences seen between the two donors (Fig. 5B). This evidence concerns the gene CCR5 and infection.