1S5I:
reference: [A new crystal form of the Fab fragment of a monoclonal antibody to human interleukin-2: the three-dimensional structure at 2.7 A resolution]., Pletnev VZ, Goriacheva EA, Tsygannik IN, Nesmeianov VA, Pletnev SV, Pangborn W, Daux W, Bioorg Khim. 2004 Sep-Oct;30(5):466-9. PMID: 15562966

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