PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2059622-1 1991 A mutant of the serine protease, subtilisin BPN", in which the catalytic His64 is replaced by Ala (H64A), is very specific for substrates containing a histidine, presumably by the substrate-bound histidine assisting in catalysis [Carter, P., & Wells, J.A. Histidine 151-160 coagulation factor II, thrombin Homo sapiens 16-31 2059622-1 1991 A mutant of the serine protease, subtilisin BPN", in which the catalytic His64 is replaced by Ala (H64A), is very specific for substrates containing a histidine, presumably by the substrate-bound histidine assisting in catalysis [Carter, P., & Wells, J.A. Histidine 196-205 coagulation factor II, thrombin Homo sapiens 16-31