PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9920833-8 1999 Amino acid sequencing of biosynthetically radiolabeled PR3 showed that PR3 from transfected cells is secreted after synthesis as proforms retaining amino terminal propeptides. propeptides 163-174 proteinase 3 Homo sapiens 71-74