dTTP + kanamycin A <=> 4'-thymidylylkanamycin A + diphosphate
dttp + kanamycin a <=> 4'-thymidylylkanamycin a + diphosphate
dTTP + kanamycin A <=> 4'-thymidylylkanamycin A + diphosphate
dttp + kanamycin a <=> 4'-thymidylylkanamycin a + diphosphate