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Pseudogenes were once thought to be genomic fossils—the broken remnants of genes that mutated long ago. However, research is progressively showing that many pseudogenes are highly functional and critical to life. Now, a newly characterized pseudogene has been shown to produce a functional protein, but only in cells where it is required—leading researchers to coin a new term pseudo-pseudogene.To finish reading, click on "Pseudo-Pseudogenes Shake Up Evolutionary Paradigm".
Pseudogenes were originally characterized as the remnants of once-functional genes. This was based on the apparent "stop signals" in their sequence that prematurely halted the production of a functional protein. However, this initial assessment was based on an over-simplistic view and a lack of advanced information about the complexity of protein production.