The human steroid 21-hydroxylase gene (CYP21A2) participates in cortisol and aldosterone biosynthesis. and resides together with its paralogous (duplicated) pseudogene in a multiallelic copy number variation (CNV). called RCCX CNV. Concerted evolution caused by non-allelic gene conversion has been described in great ape CYP21 genes. https://www.markbroyard.com/best-flash-pp-aluminum-lotion-pump-supply-amazing-save/