4WDA:
reference: Determinants of ligand binding and catalytic activity in the myelin enzyme 2',3'-cyclic nucleotide 3'-phosphodiesterase., Raasakka A, Myllykoski M, Laulumaa S, Lehtimaki M, Hartlein M, Moulin M, Kursula I, Kursula P, Sci Rep. 2015 Nov 13;5:16520. doi: 10.1038/srep16520. PMID: 26563764

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