Complete amino acid sequence of human vitamin D-binding protein (group-specific component): evidence of a three-fold internal homology as in serum albumin and α-fetoprotein

The complete amino acid sequence (458 amino acid residues) of human group-specific component 2 (Gc2) protein was determined. Computer analyses established a three-fold internal homology of Gc2 protein as well as an extensive homology between the overall structures of Gc2 protein, human serum albumin and human α-fetoprotein.