PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16973378-3 2007 The histidine tag was removed from the human enzyme by thrombin digestion and the adenylosuccinate lyase was purified by Sephadex G-100 gel filtration. Histidine 4-13 coagulation factor II, thrombin Homo sapiens 55-63