Isolation and purification of cellular retinol binding protein (CRBP) from goat mammary gland

The cellular retinol binding protein (CRBP) from goat mammary gland has been isolated in pure form. The molecular weight of CRBP by gel filtration was 15,120 dalton. The 280/350 absorbance ratio of this protein was 1.20 and it gave a single precipitin line on immunodiffusion. The method is very simple and reproducible.