4MT2:
reference: Comparison of the NMR solution structure and the x-ray crystal structure of rat metallothionein-2., Braun W, Vasak M, Robbins AH, Stout CD, Wagner G, Kagi JH, Wuthrich K, Proc Natl Acad Sci U S A 1992 Nov 1;89(21):10124-8. PMID: 1438200

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