PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24678266-4 2014 We have developed beta -lactamase from Escherichia coli (encoded by bla) in conjunction with the chromogenic substrate nitrocefin into a reporter system usable under anaerobic conditions for the methanogenic archaeon Methanosarcina acetivorans. nitrocefin 119-129 beta-lactamase Escherichia coli 68-71