PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3317405-12 1987 The demonstration that two structures common to vitamin K-dependent proteins, the homologous propeptides domain and the invariant EXXXEXC unit, are in mature MGP indicates that des-gamma-carboxy-MGP should be an excellent in vitro gamma-carboxylase substrate for analysis of mechanisms involved in substrate recognition and product dissociation. propeptides 93-104 matrix Gla protein Rattus norvegicus 158-161