Janus Kinase Family

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** A family of intracellular, non-receptor tyrosine-protein kinases. These enzymes transduce signals from certain cytokine receptors by phosphorylating and activating members of the Signal Transducer and Activator of Transcription (STAT) family of transcription factor proteins.

**Synonyms:** - JAK - JAK Family - Janus Kinase