Class A betalactamases
Ambler class A beta-lactamases are defined by amino acid structure with an active-site serine residue. Genes in this class include the SHV, TEM, PSE, and NmcA beta-lactamases.
References
- http://jac.oxfordjournals.org/content/55/6/1050.full,http://www.ncbi.nlm.nih.gov/pmc/articles/PMC162717/
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