Cryo-EM structures of the human glutamine transporter SLC1A5 (ASCT2) in the outward-facing conformation by Yu, X, Plotnikova, O, Bonin, P, Subashi, T, McLellan, T, Dumlao, D, Che, Y, Dong, Y, Carpenter, E, West, G, Qiu, X, Culp, J, Han, S