NCIt definition : Human CYP3A4*17 allele is located in the vicinity of 7q21.1 and is approximately 27
kb in length. This allele, a variant form of the CYP3A4 wild-type allele, encodes
cytochrome P450 3A4*17 protein. The CYP3A4*17 allele exhibits a clinically-relevant
SNP (g.15615T C) in exon 7 that results in a F189S coding change. This alteration
in protein sequence severely decreases the enzymatic activity of the cytochrome P450
3A4*17 protein.;