DNA Fragmentation Factor (DFF), is a heterodimer of 40 kDa (DFF40) and 45 kDa (DFF45) subunits (Liu et al., 1997). DFF45 (ICAD) appears to act as a chaperone for DFF40 (CAD) during its synthesis, remaining complexed with it to inhibit its DNase activity (Enari et al., 1998). The complex could exist as: a DFF40:DFF45 heterodimer, a (DFF40:DFF45)2 heterotetramer or a (DFF40:DFF40:DFF45:DFF45) heterotetramer (Lechardeur et al., 2005).
Liu, X, Slaughter, C, Wang, X, Zou, H
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