EGF-R (661-681) T669 Peptide is a MAPK substrate that can used to measure MAPK catalytic activity[1].
References
[1] T Fournier, et al. Divergence in macrophage insulin-like growth factor-I (IGF-I) synthesis induced by TNF-alpha and prostaglandin E2. J Immunol. 1995 Aug 15;155(4):2123-33. PMID:7636260
