Second mitochondria-derived activator of caspases, SMAC is a mitochondrial protein that promotes cytochrome-c dependent activation by eliminating the inhibition via IAP - a protein that negatively regulates apoptosis or programmed cell death. Smac is normally a mitochondrial protein but is found in the cytosol when a cell is primed for apoptosis by the final execution step of caspase activation. Smac is the second protein in the apoptosis link, along with cytochrome c, that promotes apoptosis by activating caspases. SMAC is an inhibitor of apoptosis protein (IAP)-binding protein. This mitochondrial protein enters the cytosol when cells undergo apoptosis, and it moderates the caspase inhibition of IAPs.

This antibody can specifically bind to human SMAC. The cross reactivity with mouse and rat SMAC was not tested.

Store at 4°C if intended for use within one month, otherwise, store at -20°C to -80°C. The lyophilized antibody is stable for at least 18 months after the date of receipt when stored at -20°C to -80°C. After reconstitution, it can also be aliquoted and stored frozen at -20°C to -80°C in a manual defrost freezer for at least 6 months without detectable loss of activity. Upon reconstitution, the antibody can also be stored for 30 days at 4°C. Please avoid freeze-thaw cycles, as this will lower the activity of the antibody.