PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
3108235-1	1987	Oligonucleotide-directed mutagenesis of the beta-lactamase gene, bla, on pBR322 was used to change the codon for the active-site serine 70, AGC, to CGC, coding for arginine.	pbr322	73-79	beta-lactamase	Escherichia coli	65-68	
6374659-7	1984	However, expression in pBR322 was more efficient in one orientation than in the other, suggesting that one or both of the bla gene promoters contributed to skc expression.	pbr322	23-29	beta-lactamase	Escherichia coli	122-125	
6365904-1	1984	A derivative of pBR322 has been constructed that contains both a unique EcoRI restriction site right at the beginning of the signal codons of the beta-lactamase (bla) gene and a unique BstEII site just at the end of the bla signal codons.	pbr322	16-22	beta-lactamase	Escherichia coli	162-165	
6365904-1	1984	A derivative of pBR322 has been constructed that contains both a unique EcoRI restriction site right at the beginning of the signal codons of the beta-lactamase (bla) gene and a unique BstEII site just at the end of the bla signal codons.	pbr322	16-22	beta-lactamase	Escherichia coli	220-223