beta-lactamase activity

Known as: ampicillinase activity, penicillin beta-lactamase activity, beta-lactam hydrolase activity 
Catalysis of the reaction: a beta-lactam + H2O = a substituted beta-amino acid. [EC:3.5.2.6]
National Institutes of Health

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1998
1998
New antibiotic regimens are needed for the treatment of multidrug-resistant tuberculosis. Mycobacterium tuberculosis has a thick… (More)
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1994
1994
The beta lactamase activity of serum albumin was measured using a chromogenic cephalosporin: 3-(2,4 dinitrostyryl) -(6 R, 7R) - 7… (More)
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1992
1992
The in vivo activity and source of beta-lactamase in sputum samples from 43 patients with cystic fibrosis (CF) during a 2-week… (More)
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1991
1991
An Aeromonas hydrophila gene, named cphA, coding for a carbapenem-hydrolyzing metallo-beta-lactamase, was cloned in Escherichia… (More)
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1988
1988
When Escherichia coli containing the plasmid ptac11 is induced with 10(-4) M isopropyl-beta-thiogalactopyranoside (IPTG), 90% of… (More)
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1988
1988
The enzymatic hydrolysis of benzylpenicillin was measured by a novel colorimetric procedure. The penicilloic acid generated from… (More)
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1986
1986
Strains of Escherichia coli, Enterobacter aerogenes, and Enterobacter cloacae that were resistant to ceftazidime (MIC greater… (More)
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1983
1983
Daily oral administration of ampicillin to hamsters consistently resulted in fatal ileocecitis due to ampicillin-susceptible… (More)
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1977
1977
The molecular nature of two distinct gonococcal R plasmids, 4.4 X 10(6) and 3.2 X 10(6) daltons, encoding beta-lactamase activity… (More)
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1972
1972
The product of beta-lactamase activity (a penicilloic acid in the case of a penicillin) is stoichiometrically oxidized by iodine… (More)
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