C-JUN N-terminal kinase kinase 1, Dual specificity mitogen-activated protein kinase kinase 4, EC 2.7.12.2, JNK activating kinase 1, JNK kinase 1, JNKK, JNKK 1, JNKK1, MAP kinase kinase 4, MAP2K4, MAPK/ERK kinase 4, MAPKK 4, MKK4, MP2K4, PRKMK4, SAPK/ERK