New cytokine polypeptides, and nucleic acids encoding them, are provided. Compositions including these polypeptides and nucleic acids, recombinant cells comprising said polypeptides and nucleic acids, methods of making the polypeptides and nucleic acid, antibodies to the polypeptides, and methods of using the polypeptides and nucleic acids are provided. Integrated systems comprising the sequences of the nucleic acids or polypeptides are also provided.