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Apoptosis is essential for the development and homeostasis of multicellular organisms. Recently, a cell-free extract prepared from Xenopus eggs was shown to recapitulate intracellular apoptotic pathways in vitro. While many stimuli have been shown to trigger apoptosis in a variety of cell types, the intracellular signaling pathways involved in apoptosis(More)
Many of the biochemical reactions of apoptotic cell death, including mitochondrial cytochrome c release and caspase activation, can be reconstituted in cell-free extracts derived from Xenopus eggs. In addition, because caspase activation does not occur until the egg extract has been incubated for several hours on the bench, upstream signaling processes(More)
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