2OZ4:
reference: Structural plasticity in Ig superfamily domain 4 of ICAM-1 mediates cell surface dimerization., Chen X, Kim TD, Carman CV, Mi LZ, Song G, Springer TA, Proc Natl Acad Sci U S A. 2007 Sep 25;104(39):15358-63. Epub 2007 Sep 19. PMID: 17881562

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