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J Biol Chem. 1978 Jul 10;253(13):4551-4.

Cellular retinoic acid-binding protein from rat testis. Purification and characterization.


Cellular retinoic acid-binding protein has been purified to homogeneity from rat testes. The procedures utilized in the purification included acid precipitation, gel filtration, and chromatography on DEAE-cellulose. The binding protein was purified approximately 12,000-fold, based on total soluble testicular protein. The protein is a single polypeptide chain with a molecular weight of 14,600, determined by information from gel filtration and sodium dodecyl sulfate-polyacrylamide electrophoresis. The protein binds retinoic acid with high affinity; the apparent dissociation constant was determined by fluorometric titration to be 4.2 X 10(-9) M.

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