6DR7:
reference: A YopH PTP1B Chimera Shows the Importance of the WPD-Loop Sequence to the Activity, Structure, and Dynamics of Protein Tyrosine Phosphatases., Moise G, Morales Y, Beaumont V, Caradonna T, Loria JP, Johnson SJ, Hengge AC, Biochemistry. 2018 Aug 28. doi: 10.1021/acs.biochem.8b00663. PMID: 30110154

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