See Also: lactamase(dictionary)
L49-sFv-beta-lactamase(medicine)
PPM-1 beta-lactamase(medicine)
beta-lactamase(medicine)
beta-lactamase inhibitor(medicine)
thiol beta-lactamase(medicine)

lactamase (iou)



lactamase noun. M20.
[from LACTAM + -ASE.]
Biochemistry. -lactamase, any of various bacterial enzymes which cause the breaking of the CN bond in the lactam ring of penicillins and cephalosporins (so rendering them ineffective as antibiotics).