all-trans retinal binding https://github.com/geneontology/go-ontology/issues/14750 vitamin A binding xanthopsin molecular_function visual yellow binding trans retinal binding Binding to all-trans retinal, a compound that plays an important role in the visual process in most vertebrates. All-trans retinal (trans r., visual yellow) results from the bleaching of rhodopsin by light, in which the 11-cis form is converted to the all-trans form. Retinal is one of the forms of vitamin A. GO:0005503 all-trans retinaldehyde binding retinal binding