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  • Title: Characterization of beta-lactamase from Mycobacterium butyricum ATCC 19979.
    Author: Choubey D, Gopinathan KP.
    Journal: Biochem Int; 1986 Feb; 12(2):207-14. PubMed ID: 3485977.
    Abstract:
    beta-lactamase has been purified to a homogeneous state from Mycobacterium butyricum ATCC 19979. The molecular weight (Mr = 29,000) and the isoelectric point (4,0) of the enzyme have been determined. The enzyme showed both penicillinase and cephalosporinase activity, but had relatively more of the former. With respect to substrate-profile the enzyme resembled the plasmid specified TEM-type beta-lactamases commonly encountered in Gram-negative bacteria. The enzyme was insensitive to p-chloromercuribenzoate, sodium chloride, or iodine inhibition.
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