PMID:11175744 in vitro, Y2H in vitro, GST pulldown in transfected Hela cells, coIP in Hela cells expressing fluorescent proein fusions, XAF1 is nuclear and its co-expression with XIAP induces XIAP nuclear retention in vitro, XIAP mediated inhibition of CASP3 activity is blocked by XAF1 in HEL-299 human embryonic lung cells, XAF1 expression reverts the protective effect of XIAP expression toward serum deprivation-induced cell death