JAK 3, JAK L, JAKL, Janus kinase 3 (a protein tyrosine kinase, leukocyte), L JAK, Leukocyte janus kinase, LJAK, Protein tyrosine kinase leukocyte,
Tyrosine kinase of the non-receptor type, involved in the interleukin-2 and interleukin-4 signaling pathway. Phosphorylates STAT6, IRS1, IRS2 and PI3K.