PEGylated liposomes containing JNK inhibitor SP600125 (Nsc75890). SP600125 is a reversible, ATP-competitive broad-spectrum JNK inhibitor (JNK1/JNK2, IC50 40 nM; JNK3, IC50 90 nM). with IC50s of 40, 40 and 90 nM for JNK1, JNK2 and JNK3, respectively. SP600125 is also a broad‐spectrum inhibitor of serine/threonine kinases including Aurora kinase A,FLT3 and TRKA. SP600125 inhibits ferroptosis, autophagy, and activates apoptosis. SP600125 is insoluble in aqueous media. This product is a pre-formulated liposomal version of Sp600125 which is supplied ready to use in vitro or in vivo. The liposomes are PEGylated for optimal in vivo performance. For preclinical research use only.