the chemical cleavage of lipophilin ( proteolipid apoprotein ) from bovine brain white matter with hbr/dimethyl sulfoxide at the tryptophan residues , under conditions adapted to this hydrophobic protein , releases four fragments with approximate molecular masses 14 kda ( trp i ) , 6.8 kda ( trp iv ) , 5.2 kda ( trp iii ) and 2.1 kda ( trp ii ) .
C0003601
apoprotein
C0033684
protein