SP 600125, negative control is a methylated analog of SP 600125 and can be used as a negative control for SP 600125. SP 600125, negative control inhibits DTP3 and GADD45β/MKK7 (growth arrest and DNA damage-inducible β/mediator-activated protein kinase kinase kinase 7) and is capable of restoring activation.The IC50s of SP 600125, negative control against JNK2 and JNK3 were 18 and 24 μM, respectively.

SP600125 (JNK Inhibitor II) is a JNK inhibitor that inhibits JNK1, JNK2, and JNK3 (IC50=40/40/90 nM) with oral potency, reversibility, and ATP-competitive properties. SP600125 inhibits autophagy and induces apoptosis.