• 1 January 1977
    • journal article
    • research article
    • Vol. 16 (8), 768-771
Abstract
A binding protein for retinal (vitamin A aldehyde), the 11-cis-retinal-binding protein, was present in the soluble protein fraction of rat retina but was absent from brain, lung, heart, skeletal muscle, liver, kidney, spleen, small intestine and testes. The binding protein was found in human retina but not human liver. The binding protein for retinal from human retina did not bind retinal and was larger than, and readily separable from, the cellular retinol-binding protein which did not bind retinal. The occurrence of a soluble binding protein for retinal, unlike the more widely distributed binding proteins for retinol and retinoic acid, may be unique to the retina.