5XPW:
reference: Discovery and Analysis of Invertebrate IgVJ-C2 Structure from Amphioxus Provides Insight into the Evolution of the Ig Superfamily., Chen R, Zhang L, Qi J, Zhang N, Zhang L, Yao S, Wu Y, Jiang B, Wang Z, Yuan H, Zhang Q, Xia C, J Immunol. 2018 Apr 15;200(8):2869-2881. doi: 10.4049/jimmunol.1700906. Epub 2018, Mar 7. PMID: 29514951

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