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Cytokine-induced anti-apoptosis inhibitor 1, Fe-S biogenesis Anamorsin, subsequently named CIAPIN1 for cytokine-induced anti-apoptosis inhibitor 1, in humans is the homolog of yeast Dre2, a conserved soluble eukaryotic Fe-S cluster protein, that functions in cytosolic Fe-S protein biogenesis. It is found in both the cytoplasm and in the mitochondrial intermembrane space (IMS). CIAPIN1 is found to be up-regulated in hepatocellular cancer, is considered to be a downstream effector of the receptor tyrosine kinase-Ras signalling pathway, and is essential in mouse definitive haematopoiesis. Dre2 has been found to interact with the yeast reductase Tah18, forming a tight cytosolic complex implicated in the response to high levels of oxidative stress.
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