PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6486424-1 1984 Phosphoprotein kinases from Xenopus and chicken liver have been purified and these enzymes have been used to label Xenopus vitellogenin, a phosphoprotein, to high specific activity with [gamma-32P]ATP. [gamma-32p 186-196 a1-a Xenopus laevis 123-135