PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7227306-7 1981 The incorporation of radioactive amino acids into PSP, ProPTH, PTH-(1--84), and the 5000-daltons peptide was inversely related to the calcium concentration in the incubation medium. radioactive amino acids 21-44 phosphoserine phosphatase Bos taurus 50-53