3FGS:
reference: Structural and Functional Consequences of the Substitution of Glycine 65 with Arginine in the N-Lobe of Human Transferrin (dagger)., Mason AB, Halbrooks PJ, James NG, Byrne SL, Grady JK, Chasteen ND, Bobst CE, Kaltashov IA, Smith VC, Macgillivray RT, Everse SJ, Biochemistry. 2009 Feb 16. PMID: 19219998

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