FUNCTIONALITY OF DE NOVO GENES. “Comparing genes of different ages in yeast, de novo genes, and their precursors were enriched for binding of transcription factors related to stress and mating.” Are stress and increased rates of reproduction a driver for new genes? It would make sense, given an expanded ability to exploit new emerging niches.
http://www.sciencedirect.com/science/article/pii/S0168952515000347