Term Name:	activation of Janus kinase activity
Synonyms:	activation of JAK protein, activation of JAK protein by tyrosine phosphorylation, activation of JAK1 kinase activity, activation of JAK1 protein, activation of JAK2 kinase activity, activation of JAK2 protein, positive regulation of JAK protein activity by tyrosine phosphorylation, tyrosine phosphorylation of JAK protein, tyrosine phosphorylation of JAK1 protein, tyrosine phosphorylation of JAK2 protein
Definition:	The process of introducing a phosphate group to a tyrosine residue of a JAK (Janus Activated Kinase) protein, thereby activating it.
Ontology:	GO: Biological Process [GO:0042976]    QuickGO    AmiGO