if the primary structure of apoprotein a-i and the fragments of apoprotein e are involved in consideration , the hydrophilic reaction appears to occur between the hydroxyl group of cholesterol and a guanidine group of the protein arginine residues as well as hydrophobic reaction - between side aliphatic chain of the sterol and the branched-chain amino acid , present in the protein at a distance of 4 amino acid residues from the arginine residue .
C0003601
apoprotein
C0033684
protein