Vitamin action, CRBPs

Re.seaa-h since the mid-1980s has taken va.si strides in determining the molecular mechanism of action of vitamin A. It appears that the vitamin exerts its biological function with respect to development, diffcrcnlialion. and metabolism like a steroid hormone. The biologically active species is believed to be retinoic acid. Two intracellular retinoic acid-binding proteins have been isolated. CRABP(I) and CRABPfll). The.se appear to have functions similar to those of the CRBPs. 

---