6WBH:
reference: Structure of the RECK CC domain, an evolutionary anomaly., Chang TH, Hsieh FL, Smallwood PM, Gabelli SB, Nathans J, Proc Natl Acad Sci U S A. 2020 Jun 15. pii: 2006332117. doi:, 10.1073/pnas.2006332117. PMID: 32541044

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