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Table 2 β-Lactamase activity and presence of blaZ in laboratory-stock BIVR and non-BIVR strains

From: Low level β-lactamase production in methicillin-resistant staphylococcus aureus strains with β-lactam antibiotics-induced vancomycin resistance

Strains blaZ β-lactamase activity (μmol/min/mg protein)
Reference strains   
FDA209P (MSSA) - <1 × 10-4
N315 (non-BIVR) + 7.39 × 10-1
Mu3 (BIVR) - <1 × 10-4
BIVR strains   
K101 - <1 × 10-4
K638 - <1 × 10-4
K670 - <1 × 10-4
K744 - <1 × 10-4
K2480 - <1 × 10-4
Non-BIVR strains   
K1 + 1.94 × 10-1
K27 + 1.27 × 10-1
K51 + 6.24 × 10-1
K54 + 11.1
K1179 + 9.06 × 10-1
Transformants   
K744-T + <1 × 10-4
K2480-T + <1 × 10-4