2JXL:
reference: Tryptophan Mutants of Cardiac Troponin C: 3D Structure, Troponin I Affinity, and in Situ Activity(,)., Julien O, Sun YB, Wang X, Lindhout DA, Thiessen A, Irving M, Sykes BD, Biochemistry. 2008 Jan 15;47(2):597-606. Epub 2007 Dec 20. PMID: 18092822

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