kanamycin A + GTP <=> 4'-guanylylkanamycin A + diphosphate
kanamycin a + gtp <=> 4'-guanylylkanamycin a + diphosphate
kanamycin A + GTP <=> 4'-guanylylkanamycin A + diphosphate
kanamycin a + gtp <=> 4'-guanylylkanamycin a + diphosphate