amikacin + dTTP <=> 4'-thymidylylamikacin + diphosphate
amikacin + dttp <=> 4'-thymidylylamikacin + diphosphate
amikacin + dTTP <=> 4'-thymidylylamikacin + diphosphate
amikacin + dttp <=> 4'-thymidylylamikacin + diphosphate