Definition: A Janus kinase subtype that is predominantly expressed in hematopoietic cell. It is involved in signaling from a broad variety of CYTOKINE RECEPTORS including ones that utilize the INTERLEUKIN RECEPTOR COMMON GAMMA SUBUNIT.
Other names Kinase 3, Janus; JAK 3 Protein Tyrosine Kinase; JAK3 Protein Tyrosine Kinase; JAK-3 Protein Tyrosine Kinase