1JQF:
reference: Ligand variation in the transferrin family: the crystal structure of the H249Q mutant of the human transferrin N-lobe as a model for iron binding in insect transferrins., Baker HM, Mason AB, He QY, MacGillivray RT, Baker EN, Biochemistry 2001 Oct 2;40(39):11670-5. PMID: 11570867

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