Nucleotide sequence of the ampicillin
resistance gene( beta-lactamase) of
Escherichia coli plasmid pBR322 (Genome:
4361 bases; Accession: J01749  GI:208958)
Sutcliffe,J.G., Nucleotide sequence of the ampicillin resistance
gene of Escherichia coli plasmid pBR322. Proc. Natl. Acad. Sci.
U.S.A. 75 (8), 3737-3741 (1978); MEDLINE   79012484