PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9371365-4 1997 Substitutions for Arg-244 have been reported in three TEM-1 mutants: IRT-1 (which corresponds to TEM-31) (Cys), IRT-2/TEM-30 (Ser), and TEM-41 (Thr). Arginine 18-21 hypothetical protein Escherichia coli 54-59 8877532-3 1996 The blaIRT gene differs from blaTEM-2 gene by one point mutation which leads to the amino-acid substitution Arg-->Ser at position 244, as observed for the original IRT-2 enzyme derived from TEM-1 reported in Escherichia coli. Arginine 108-111 hypothetical protein Escherichia coli 193-198