Table 2.

List of variant-specific mutations among CTX-M-1 cluster enzymes.

Enzyme	Mutation	Enzyme	Mutation	Enzyme	Mutation
CTX-M-54	Pro170Gln	CTX-M-143	Asn173Ser	CTX-M-194	Arg7His
CTX-M-64	Ser89Thr	CTX-M-154	Glu39Lys	CTX-M-197	Leu158Val
CTX-M-66	Ser23Asn	CTX-M-164	Gln8Lys	CTX-M-204	Thr168Ile
CTX-M-68	Glu161Asp	CTX-M-170	Asp203Asn	CTX-M-207	Asp242Ser
CTX-M-72	Arg167Gly	CTX-M-172	Leu141Pro	CTX-M-208	Ala222Glu
CTX-M-88	Arg277His	CTX-M-173	Ala153Thr	CTX-M-209	Thr212Ile
CTX-M-101	Ser126Ile	CTX-M-176	Thr267Ala	CTX-M-210	Ala31Thr
CTX-M-103	Ser240Asn	CTX-M-177	Gln157Leu	CTX-M-211	Met2Lys
CTX-M-114	Val77Ala	CTX-M-179	Pro269Thr		Val2Ser
CTX-M-117	Pro177Gln	CTX-M-181	Asn135His	CTX-M-216	Gly290Ser
CTX-M-123	Val233Thr	CTX-M-182	Lys36Arg	CTX-M-224	Gln8Leu
CTX-M-127	Asn138Thr	CTX-M-183	Thr30Lys	CTX-M-226	Pro25Thr
CTX-M-138	Ile286Ser	CTX-M-184	Asn58Thr	CTX-M-227	Gly290Arg
CTX-M-139	Tyr27Phe	CTX-M-186	Thr20Ser	CTX-M-228	Ser223Asn
CTX-M-142	Asp32Asn	CTX-M-187	Leu291Ser	CTX-M-230	Ala174Ile
CTX-M-150	Asn216His	CTX-M-188	Ala82Thr	CTX-M-231	Ala31Glu
	Thr218His	CTX-M-189	Ser133Gly	CTX-M-232	Ala15Thr