PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 386030-1 1979 A ColEl hybrid plasmid, pNUl, carrying the amp operon coding for chromosomal beta-lactamase was isolated from the Clarke and Carbon collection and physically mapped. Adenosine Monophosphate 43-46 beta-lactamase Escherichia coli 77-91