This peptide corresponds to 14 amino acids near the amino terminus of human XAF-1 (IN).
PEP-0208 can be used as a blocking peptide with polyclonal antibody PA5-20090.
The inhibitors of apoptosis (IAP) proteins prevent cell death both in vitro and in vivo by virtue of inhibition of distinct caspases. The X-linked Inhibitor of Apoptosis, XIAP, is a key member of the IAP family of proteins. The caspase inhibiting activity of XIAP is negatively regulated by at least two XIAP-interacting proteins, XIAP-associated factor 1 (XAF1) and Smac/DIABLO. XAF1 binds to XIAP and antagonizes caspase inhibitory activities of XIAP. Expression of XAF1 triggers a redistribution of XIAP from the cytosol to the nucleus. XAF1 is ubiquitously expressed in normal tissues, but is present at low or undetectable levels in many different cancer cell lines.