Tryptophan-mediated interactions between tristetraprolin and the CNOT9 subunit are required for CCR4-NOT deadenylase complex recruitment by Bulbrook, D, Brazier, H, Mahajan, P, Kliszczak, M, Fedorov, O, Marchese, F, Aubareda, A, Chalk, R, Picaud, S, Strain-Damerell, C, Filippakopoulos, P, Gileadi, O, Clark, A, Yue, W, Burgess-Brown, N, Dean, J