label: 11-cis retinal binding
label_lc: 11-cis retinal binding
description: "Binding to 11-cis retinal, an isomer of retinal that plays an important role in the visual process in most vertebrates. 11-cis retinal combines with opsin in the rods (scotopsin) to form rhodopsin or visual purple. Retinal is one of the three compounds that makes up vitamin A."