: Phosphorylated STATs dissociate and form dimers.
: A cytokine binds to its transmembrane receptor.
: STAT proteins bind to these sites and are themselves phosphorylated by JAKs.
: Phosphorylated STATs dissociate and form dimers.
: A cytokine binds to its transmembrane receptor.
: STAT proteins bind to these sites and are themselves phosphorylated by JAKs.