1NQB:
reference: The 2.0-A resolution crystal structure of a trimeric antibody fragment with noncognate VH-VL domain pairs shows a rearrangement of VH CDR3., Pei XY, Holliger P, Murzin AG, Williams RL, Proc Natl Acad Sci U S A 1997 Sep 2;94(18):9637-42. PMID: 9275175

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