1. Avery, Stuart, Rothwell, Lisa, Degen, Winfried D J, Kaufman, Jim, Kaiser, Pete. . Characterization of the first nonmammalian T2 cytokine gene cluster: the cluster contains functional single-copy genes for IL-3, IL-4, IL-13, and GM-CSF, a gene for IL-5 that appears to be a pseudogene, and a gene encoding another cytokinelike transcript, KK34. In Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research, 24, 600-10. doi:. https://pubmed.ncbi.nlm.nih.gov/15626157/