4ZF7:
reference: Structural and functional characterisation of ferret interleukin-2., Ren B, McKinstry WJ, Pham T, Newman J, Layton DS, Bean AG, Chen Z, Laurie KL, Borg K, Barr IG, Adams TE, Dev Comp Immunol. 2015 Oct 22;55:32-38. doi: 10.1016/j.dci.2015.10.007. PMID: 26472619

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