Klaus Steger, Ph.D., is a molecular biologist with a research focus in the genetic and epigenetic regulation of gene expression during normal and aberrant sperm development. Over the past 30 years, his research projects were continuously funded by the German Research Foundation, while he headed several gene technology laboratories regularly applying RNA-based technologies. He served as a professor of anatomy and cell biology at the University of Giessen, Germany, for 23 years before retiring this year. He holds a doctorate in natural sciences from the University of Regensburg.