the sensitive variants of the two remaining strains showed no increase in [ 3h ] gentamicin accumulation but still produced aminoglycoside-modifying enzymes , and it is suggested that the broad-spectrum aminoglycoside resistance of these two strains is due to some hitherto undescribed mechanisms of resistance rather than an alteration of the ribosomal target .
C0017436
gentamicin
C0002556
aminoglycoside