Fig. 2: Cryo-EM structures of the M2-hB7.1 and M2-hB7.2 complexes.

a, b The overall structures of M2-hB7.1 hexamer (a) and M2-hB7.2 hexamer (b). M2, hB7.1 and hB7.2 are colored salmon, green and skyblue, respectively. c Structure of a single M2 subunit. d M2 subunit interface of M2-hB7.1 hexamer. Disulfide bonds are indicated with yellow sticks.