Cryo-EM structure of the human Kv3.1 channel reveals gating control by the cytoplasmic T1 domain Por Chi, G, Liang, Q, Sridhar, A, Cowgill, JB, Sader, K, Radjainia, M, Qian, P, Castro-Hartmann, P, Venkaya, S, Singh, NK, McKinley, G, Fernandez-Cid, A, Mukhopadhyay, SMM, Burgess-Brown, NA, Delemotte, L, Covarrubias, M, Dürr, KL