1ELP:
reference: Structure of bovine eye lens gammaD (gammaIIIb)-crystallin at 1.95 A., Chirgadze YN, Driessen HP, Wright G, Slingsby C, Hay RE, Lindley PF, Acta Crystallogr D Biol Crystallogr. 1996 Jul 1;52(Pt 4):712-21. PMID: 15299634

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