BACKGROUND: Choroideremia (CHM) is a progressive X-linked retinopathy caused by mutations in the CHM gene. which encodes Rab escort protein-1 (REP-1). an escort protein involved in the prenylation of Rabs. Under-prenylation of certain Rabs. https://www.bekindtopets.com/hot-offer-Stuart-Product-Emcelle-Tocopherol-Vitamin-E-Liquid-1-Liter-hot-value/