Activation of JAK3, but not JAK1, is critical to interleukin-4 (IL4) stimulated proliferation and requires a membrane-proximal region of IL4 receptor alpha.
Malabarba MG, Kirken RA, Rui H, Koettnitz K, Kawamura M, O'Shea JJ, Kalthoff FS, Farrar WL. Activation of JAK3, but not JAK1, is critical to interleukin-4 (IL4) stimulated proliferation and requires a membrane-proximal region of IL4 receptor alpha. J Biol Chem. 1995 Apr 21; 270(16):9630-7.