PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6790577-9 1981 However, the H-protein from the patient could stimulate the P-protein catalyzed exchange of the carboxyl carbon of glycine with 14CO2, although the specific activity of the purified H-protein from the patient was only 4% of that of control human H-protein. 14co2 128-133 OCA2 melanosomal transmembrane protein Homo sapiens 60-69