Abstract
A 1173-base pair cDNA encoding bovine cellular retinaldehyde-binding protein (CRALBP) was cloned from a bovine retinal cDNA expression library using as probes both anti-CRALBP polyclonal and monoclonal antibodies. The amino acid sequence deduced from the cDNA corresponds exactly to that determined by direct analysis of NH2-terminally acetylated bovine CRALBP (Crabb, J. W., Johnson, C. M., Carr, S. A., Armes, L. G., and Saari, J. C. (1988) J. Biol. Chem. 263, 18678-18687). Nick-translated bovine CRALBP cDNA probes were then used to clone from a human retinal cDNA library a 1317-base pair cDNA encoding human CRALBP. Bovine and human CRALBP are 92% identical in amino acid sequence and not related to any other known protein sequence. Both the bovine and human proteins contain 316 residues and have calculated molecular weights of 36,378 and 36,347, respectively, exclusive of the NH2-terminal blocking groups. The CRALBP cDNA clones should prove valuable as tools for studying the physiological role of the protein in vision and visual disorders.
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