5EB9:
reference: The structural basis of chicken, swine and bovine CD8alphaalpha dimers provides insight into the co-evolution with MHC I in endotherm species., Liu Y, Li X, Qi J, Zhang N, Xia C, Sci Rep. 2016 Apr 28;6:24788. doi: 10.1038/srep24788. PMID: 27122108

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