3SR9:
reference: Structural insights into the homology and differences between mouse protein tyrosine phosphatase-sigma and human protein tyrosine phosphatase-sigma., Hou L, Wang J, Zhou Y, Li J, Zang Y, Li J, Acta Biochim Biophys Sin (Shanghai). 2011 Dec;43(12):977-88. Epub 2011 Oct 25. PMID: 22027896

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