amikacin + CTP <=> 4'-cytidylylamikacin + diphosphate
amikacin + ctp <=> 4'-cytidylylamikacin + diphosphate
amikacin + CTP <=> 4'-cytidylylamikacin + diphosphate
amikacin + ctp <=> 4'-cytidylylamikacin + diphosphate