FIG 3.

Interaction between A⁷⁷/V⁷⁷ and other residues in the adjacent helixes of CTX-M-15 and CTX-M-55. (A) A⁷⁷ in CTX-M-15 interacting with residues L⁸¹, L¹²⁷, L¹³⁸, and W²¹⁰: the distances between A⁷⁷ and L⁸¹, L¹²⁷, L¹³⁸, and W²¹⁰ were 5.3 Å, 3.8 Å, 4.2 Å, and 4.9 Å, respectively; (B) V⁷⁷ in CTX-M-15 interacting with residues L⁸¹, L¹²⁷, L¹³⁸, and W²¹⁰: the distances between V⁷⁷ and L⁸¹, L¹²⁷, L¹³⁸, and W²¹⁰ were 4.2 Å, 3.6 Å, 3.2 Å, and 3.4 Å, respectively.