Published in Biochem J on May 01, 1962
Cefamandole, a cephalosporin antibiotic with an unusually wide spectrum of activity. Antimicrob Agents Chemother (1974) 10.72
Cefoxitin, a semisynthetic cephamycin antibiotic: antibacterial spectrum and resistance to hydrolysis by gram-negative beta-lactamases. Antimicrob Agents Chemother (1974) 9.66
Staphylococcal penicillinase and the new penicillins. Biochem J (1962) 9.04
Cefoxitin, a semisynthetic cephamycin antibiotic: resistance to beta-lactamase inactivation. Antimicrob Agents Chemother (1974) 8.84
Host range and properties of the Pseudomonas aeruginosa R factor R1822. J Bacteriol (1973) 8.80
Properties of a R factor which originated in Pseudomonas aeruginosa 1822. J Bacteriol (1972) 8.56
Function of the outer membrane of Escherichia coli as a permeability barrier to beta-lactam antibiotics. Antimicrob Agents Chemother (1977) 7.70
CP-45,899, a beta-lactamase inhibitor that extends the antibacterial spectrum of beta-lactams: initial bacteriological characterization. Antimicrob Agents Chemother (1978) 6.28
Cefuroxime, a beta-lactamase-resistant cephalosporin with a broad spectrum of gram-positive and -negative activity. Antimicrob Agents Chemother (1978) 5.81
Iodometric detection of Haemophilus influenzae beta-lactamase: rapid presumptive test for ampicillin resistance. Antimicrob Agents Chemother (1975) 5.78
Inheritance of low-level resistance to penicillin, tetracycline, and chloramphenicol in Neisseria gonorrhoeae. J Bacteriol (1975) 5.02
The purification and properties of a penicillinase whose synthesis is mediated by an R-factor in Escherichia coli. Biochem J (1966) 4.87
PURIFICATION AND PROPERTIES OF PENICILLINASES FROM TWO STRAINS OF BACILLUS LICHENIFORMIS: A CHEMICAL, PHYSICOCHEMICAL AND PHYSIOLOGICAL COMPARISON. Biochem J (1965) 4.57
Cephamycins, a new family of beta-lactam antibiotics: antibacterial activity and resistance to beta-lactamase degradation. Antimicrob Agents Chemother (1973) 4.45
Resistance of Escherichia coli to penicillins. VI. Purification and characterization of the chromosomally mediated penicillinase present in ampA-containing strains. J Bacteriol (1970) 4.34
Microiodometric determination of beta-lactamase activity. Antimicrob Agents Chemother (1972) 4.28
Cefoxitin resistance to beta-lactamase: a major factor for susceptibility of bacteroides fragilis to the antibiotic. Antimicrob Agents Chemother (1977) 4.14
Purification and properties of a new beta-lactamase from Pseudomonas cepacia. Antimicrob Agents Chemother (1980) 4.09
PURIFICATION AND PROPERTIES OF THE EXOPENICILLINASE FROM STAPHYLOCOCCUS AUREUS. Biochem J (1963) 3.91
WILD-TYPE VARIANTS OF EXOPENICILLINASE FROM STAPHYLOCOCCUS AUREUS. Biochem J (1965) 3.79
Biochemical properties of beta-lactamase produced by Flavobacterium odoratum. Antimicrob Agents Chemother (1985) 3.62
Inhibition of the -lactamases of Escherichia coli and Klebsiella aerogenes by semi-synthetic penicillins. Biochem J (1972) 3.57
Mutant of Escherichia coli with anomalous cell division and ability to decrease episomally and chromosomally mediated resistance to ampicillin and several other antibiotics. J Bacteriol (1969) 3.54
Induction of beta-lactamase by various beta-lactam antibiotics in Enterobacter cloacae. Antimicrob Agents Chemother (1980) 3.48
Plasmid-mediated penicillin beta-lactamases in Pseudomonas aeruginosa. Antimicrob Agents Chemother (1976) 3.40
Extrachromosomal control of methicillin resistance and toxin production in Staphylococcus aureus. J Bacteriol (1969) 3.34
Variant of penicillinase mediated by an R factor in Escherichia coli. J Bacteriol (1970) 3.33
Outer membrane permeation of beta-lactam antibiotics in Escherichia coli, Proteus mirabilis, and Enterobacter cloacae. Antimicrob Agents Chemother (1982) 3.24
Rapid detection of ampicillin-resistant Haemophilus influenzae and their susceptibility to sixteen antibiotics. Antimicrob Agents Chemother (1975) 3.09
Rapid fixed-time assay for penicillinase. J Bacteriol (1968) 3.00
Comparative inhibition beta-lactamases by novel beta-lactam compounds. Antimicrob Agents Chemother (1979) 2.97
Biochemical properties of a penicillin beta-lactamase mediated by R factor from Bordetella bronchiseptica. Antimicrob Agents Chemother (1975) 2.70
Transfer of chromosomal genes mediated by plasmid r68.45 in Rhodopseudomonas sphaeroides. J Bacteriol (1977) 2.69
Mechanism of resistance of an ampicillin-resistant, beta-lactamase-negative clinical isolate of Haemophilus influenzae type b to beta-lactam antibiotics. Antimicrob Agents Chemother (1984) 2.65
The purification and properties of the -lactamase specified by the resistance factor R-1818 in Escherichia coli and Proteus mirabilis. Biochem J (1971) 2.53
Resistance of Escherichia coli to penicillins. VII. Purification and characterization of a penicillinase mediated by the R factor R1. J Bacteriol (1970) 2.49
Cefaclor: in vitro spectrum of activity and beta-lactamase stability. Antimicrob Agents Chemother (1978) 2.42
Gonococcal resistance to beta-lactams and tetracycline involves mutation in loop 3 of the porin encoded at the penB locus. Antimicrob Agents Chemother (1998) 2.41
Purification and properties of a cephalosporinase from Enterobacter cloacae. Antimicrob Agents Chemother (1980) 2.37
STIMULATING AND INHIBITING ANTIBODIES FOR BACTERIAL PENICILLINASE. Immunology (1964) 2.36
The inhibition of staphylococcal beta-lactamase by clavulanic acid. Biochem J (1979) 2.30
Resistance of Escherichia coli to penicillins. V. Physiological comparison of two isogenic strains, one with chromosomally and one with episomally mediated ampicillin resistance. J Bacteriol (1968) 2.27
Nucleotide sequence and expression of the beta-lactamase gene from Staphylococcus aureus plasmid pI258 in Escherichia coli, Bacillus subtilis, and Staphylococcus aureus. J Bacteriol (1987) 2.27
Properties of a new penicillinase type produced by Bacteroides fragilis. Antimicrob Agents Chemother (1982) 2.27
Nature of the genetic determinant controlling exfoliative toxin production in Staphylococcus aureus. J Bacteriol (1974) 2.23
Purification and characterization of macrolide 2'-phosphotransferase from a strain of Escherichia coli that is highly resistant to erythromycin. Antimicrob Agents Chemother (1989) 2.05
Substrate-specific inactivation of staphylococcal penicillinase. Biochem J (1967) 1.98
Purification and properties of beta-lactamase from Proteus morganii. J Bacteriol (1977) 1.96
Purification and properties of cephalosporinase in Escherichia coli. Antimicrob Agents Chemother (1980) 1.90
The purification and some properties of a beta-lactamase (cephalosporinase) synthesized by Enterobactercloacae. Biochem J (1968) 1.86
Localization of cell-bound penicillinase in Bacillus licheniformis. J Bacteriol (1968) 1.84
Semisynthetic penicillin 6-(D(--)-alpha-carboxy-3-thienylacetamido) penicillanic acid active against Pseudomonas in vitro. Appl Microbiol (1971) 1.77
Characterization of R factor beta-lactamases by the acidimetric method. Antimicrob Agents Chemother (1973) 1.76
Lysostaphin: an enzymatic approach to staphylococcal disease. I. In vitro studies. Yale J Biol Med (1967) 1.75
Penicillinases of Klebsiella pneumoniae and their phylogenetic relationship to penicillinases mediated by R factors. J Bacteriol (1973) 1.74
Translational fusion with a secretory enzyme as an indicator. J Bacteriol (1987) 1.69
Inducible oxacillin-hydrolyzing penicillinase in Aeromonas hydrophila isolated from fish. Antimicrob Agents Chemother (1976) 1.67
Characterization of eight beta-lactamases of Gram-negative bacteria. J Bacteriol (1982) 1.57
R factor-mediated and chromosomal resistance to ampicillin in Escherichia coli. Antimicrob Agents Chemother (1974) 1.56
Automated method for determination of penicillins, cephalosporins, and penicillinases. Antimicrob Agents Chemother (1972) 1.53
Beta-lactamases produced by a Pseudomonas aeruginosa strain highly resistant to carbenicillin. Antimicrob Agents Chemother (1977) 1.47
A direct comparison of two unusual R-factor-mediated -lactamases. Biochem J (1972) 1.46
Nucleotide sequence and characterization of a carbenicillin-hydrolyzing penicillinase gene from Proteus mirabilis. J Bacteriol (1991) 1.41
Chromosomal location and nucleotide sequence of the Escherichia coli dapA gene. J Bacteriol (1986) 1.41
Site-specific recombination at oriT of plasmid R1162 in the absence of conjugative transfer. J Bacteriol (1989) 1.37
Multiple regulatory signals in the control region of the Escherichia coli carAB operon. Proc Natl Acad Sci U S A (1984) 1.37
Kinetic studies on inactivation of Citrobacter freundii cephalosporinase by sulbactam. Antimicrob Agents Chemother (1983) 1.37
Kinetic parameters of efflux of penicillins by the multidrug efflux transporter AcrAB-TolC of Escherichia coli. Antimicrob Agents Chemother (2010) 1.30
Isolation and characterization of a penicillinase from Pseudomonas cepacia 249. Antimicrob Agents Chemother (1988) 1.28
Characterization and extrachromosomal control of bacteriocin production in Staphylococcus aureus. Antimicrob Agents Chemother (1973) 1.23
Extension of the substrate spectrum by an amino acid substitution at residue 219 in the Citrobacter freundii cephalosporinase. J Bacteriol (1990) 1.09
The Pseudomonas cepacia 249 chromosomal penicillinase is a member of the AmpC family of chromosomal beta-lactamases. Antimicrob Agents Chemother (1993) 1.04
Importance of beta-lactamase inhibitor pharmacokinetics in the pharmacodynamics of inhibitor-drug combinations: studies with piperacillin-tazobactam and piperacillin-sulbactam. Antimicrob Agents Chemother (1997) 1.03
Partial characterization of a beta-lactamase from Vibrio parahaemolyticus by a new automated microiodometric technique. Antimicrob Agents Chemother (1978) 1.03
Antitermination by both the promoter and the leader regions of an Escherichia coli ribosomal RNA operon. Proc Natl Acad Sci U S A (1985) 1.02
Characterization of ampicillin-resistant Haemophilus parainfluenzae. Antimicrob Agents Chemother (1982) 1.02
Permeation rates of penicillins indicate that Escherichia coli porins function principally as nonspecific channels. Proc Natl Acad Sci U S A (2013) 1.02
Phenotypic suppression of methicillin resistance in Staphylococcus aureus by mutant noninducible penicillinase plasmids. J Bacteriol (1972) 1.00
Purification by affinity chromatography and properties of a beta-lactamase isolated from Neisseria gonorrhoeae. Antimicrob Agents Chemother (1979) 1.00
-lactamases of R factors derived from Shigella and Salmonella strains. J Bacteriol (1971) 1.00
Characterization and prevalence of the different mechanisms of resistance to beta-lactam antibiotics in clinical isolates of Escherichia coli. Antimicrob Agents Chemother (1974) 0.98
Laboratory evaluation of 3-(5-tetrazolyl) penam, a new semisynthetic beta-lactam antibacterial agent with extended broad-spectrum activity. Antimicrob Agents Chemother (1976) 0.97
Characterization of concatemeric plasmids of Neisseria gonorrhoeae. Infect Immun (1983) 0.96
Characterization of beta-lactamase-deficient (bla) mutants of the R plasmid R1 in Escherichia coli K-12 and comparison with similar mutants of RP1. Antimicrob Agents Chemother (1980) 0.95
Immunochemical comparison between an oxacillin-hydrolyzing penicillinase of Aeromonas hydrophila and those mediated by R plasmids. J Bacteriol (1978) 0.92
Development of plasmid-mediated resistance in Vibrio cholerae during treatment with trimethoprim-sulfamethoxazole. Antimicrob Agents Chemother (1985) 0.90
Lipolytic activity copurified with the outer membrane of Serratia marcescens. J Bacteriol (1979) 0.90
Staphylococcus aureus chromosomal mutation plaC1 amplifies plasmid pT181 by depressing synthesis of its negative-effector countertranscripts. J Bacteriol (1989) 0.88
Measurement of gene expression by translational coupling: effect of copy mutations on pT181 initiator synthesis. EMBO J (1993) 0.87
High salt concentrations increase permeability through OmpC channels of Escherichia coli. J Biol Chem (2014) 0.86
Outer membrane permeation of Bacteroides fragilis by cephalosporins. Antimicrob Agents Chemother (1988) 0.85
Penicillinase (beta-lactamase) induction in Bacillus licheniformis under Pseudogratuitous conditions by 2-(2'-carboxyphenyl)-benzoyl-6-aminopenicillanic acid. J Bacteriol (1970) 0.85
In vitro activity and beta-lactamase stability of cefazaflur compared with those of beta-lactamase-stable cephalosporins. Antimicrob Agents Chemother (1979) 0.85
Penem derivatives: beta-lactamase stability and affinity for penicillin-binding proteins in Escherichia coli. Antimicrob Agents Chemother (1982) 0.84
Synthesis of R-plasmid-coded beta-lactamase in minicells and in an in vitro system. J Bacteriol (1977) 0.84
Antibacterial activity of cefoperazone alone and in combination against cephalosporinase-producing Enterobacter cloacae. Antimicrob Agents Chemother (1983) 0.83
The displacement of three anionic drugs from binding to bovine serum albumin by various anionic compounds. Br J Pharmacol Chemother (1966) 0.82
Nuclear magnetic resonance spectrometric assay of beta-lactamase. Antimicrob Agents Chemother (1980) 0.82
Klebsiella pneumoniae Major Porins OmpK35 and OmpK36 Allow More Efficient Diffusion of β-Lactams than Their Escherichia coli Homologs OmpF and OmpC. J Bacteriol (2016) 0.81
Zone electrophoresis in starch gels: group variations in the serum proteins of normal human adults. Biochem J (1955) 35.79
Iodometric assay of penicillinase. Nature (1954) 19.22
Staphylococcal penicillinase and the new penicillins. Biochem J (1962) 9.04
The cell-bound penicillinase of Bacillus cereus. J Gen Microbiol (1956) 6.01
ANALYSIS BY TRANSDUCTION OF MUTATIONS AFFECTING PENICILLINASE FORMATION IN STAPHYLOCOCCUS AUREUS. J Gen Microbiol (1963) 13.54
NATURE AND INTERACTIONS OF THE GENETIC ELEMENTS GOVERNING PENICILLINASE SYNTHESIS IN STAPHYLOCOCCUS AUREUS. J Bacteriol (1965) 9.96
Staphylococcal penicillinase and the new penicillins. Biochem J (1962) 9.04
Control by endogenously synthesized arginine of the formation of ornithine transcarbamylase in Escherichia coli. J Bacteriol (1961) 3.42