Journal
CELL
Volume 136, Issue 3, Pages 389-392Publisher
CELL PRESS
DOI: 10.1016/j.cell.2009.01.027
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Many crucial components of signal transduction, developmental, and metabolic pathways have functionally redundant copies. Further, these redundancies show surprising evolutionary stability over prolonged time scales. We propose that redundancies are not just archeological leftovers of ancient gene duplications, but rather that synergy arising from feedback between redundant copies may serve as an information processing element that facilitates signal transduction and the control of gene expression.
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