PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 211676-2 1978 The inactivation similarly occurred in the dopa-tyrosinase reaction system containing ascorbic aicd, although in the presence of ascorbic acid the dopa-quinone is immediately converted back to dopa and therefore melanin formation does not take place. Ascorbic Acid 129-142 tyrosinase Mus musculus 48-58