1JLI3562n/aENSG00000164399n/aP08700n/aNM_000588n/aNP_000579n/aInterleukin 3 (IL-3) is a protein that in humans is encoded by the IL3 gene localised on chromosome 15q31.1. Interleukin 3 (IL-3) is a protein that in humans is encoded by the IL3 gene localised on chromosome 15q31.1.