Biochemical characterization of RAR1 cysteine- and histidine-rich domains (CHORDs): a novel class of zinc-dependent protein-protein interaction modules. by Heise, C, Le Duff, C, Boter, M, Casais, C, Airey, J, Leech, A, Amigues, B, Guerois, R, Moore, G, Shirasu, K, Kleanthous, K