3MMJ:
reference: Substrate binding in protein-tyrosine phosphatase-like inositol polyphosphatases., Gruninger RJ, Dobing S, Smith AD, Bruder LM, Selinger LB, Wieden HJ, Mosimann SC, J Biol Chem. 2012 Mar 23;287(13):9722-30. doi: 10.1074/jbc.M111.309872. Epub 2011, Dec 2. PMID: 22139834

This OCA Structure page
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