(A) SSEs of the linker subunit C1 in the resting state identified by SSEHunter. Eleven α-helices longer than 2-turns (cyan cylinders) and three large β-sheets (green surfaces) have been identified in this subunit.
(B) SSEs of the same subunit C1 in the activated state. Ten α-helices (orange cylinders) and three β-sheets (pink surfaces) are identified.
(C)/(D) Pseudo atomic model of C1 subunit fitted into the corresponding map of the resting/activated state where blue/yellow coloring represents the resting/activated state. The same color scheme is utilized in the rest of the figures.