3RFS:
reference: Design of a binding scaffold based on variable lymphocyte receptors of jawless vertebrates by module engineering., Lee SC, Park K, Han J, Lee JJ, Kim HJ, Hong S, Heu W, Kim YJ, Ha JS, Lee SG, Cheong HK, Jeon YH, Kim D, Kim HS, Proc Natl Acad Sci U S A. 2012 Feb 28;109(9):3299-304. Epub 2012 Feb 10. PMID: 22328160

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