The CYP17A1 enzyme (GeneID: 1586, 10q24.32, GRCh38 chr10:102,830,531-102,837,533, NCBI: NM_000102.4, NP_000093.1, OMIM: 609300) regulates sex steroid biosynthesis in humans through 17α-hydroxylase/17,20 lyase activities and is a target of the anti-prostate cancer drug abiraterone [39,40,41]. The gene discussed is CYP17A1; the disease is prostate carcinoma.