PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3988798-8 1985 When a HeLa transformant was incubated with the arginine analogue canavanine, the major form of newly synthesized OTC detected was a species migrating slightly more slowly than the normal precursor; little mature-sized subunit was recovered. Canavanine 66-76 ornithine transcarbamylase Homo sapiens 114-117