Covalent targeting of remote cysteine residues to develop CDK12 and 13 inhibitors by Bullock, A, Elkins, J, Dixon-Clarke, S, Zhang, T, Kwiatkowski, N, Olson, C, Abraham, B, Greifenberg, A, Ficarro, S, Liang, Y, Hannett, N, Manz, T, Hao, M, Bartkowiak, B, Greenleaf, A, Marto, J, Geyer, M, Young, R, Gray, N