1LSQ:
reference: Deamidation in proteins: the crystal structure of bovine pancreatic ribonuclease with an isoaspartyl residue at position 67., Capasso S, Di Donato A, Esposito L, Sica F, Sorrentino G, Vitagliano L, Zagari A, Mazzarella L, J Mol Biol 1996 Apr 5;257(3):492-6. PMID: 8648618

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