Identifying cellular and molecular differences between human and non-human primates is essential to the basic understanding of the evolution and diversity of our own species. While preserved tissues are the main source of comparative studies between humans, chimpanzees and bonboos, the samples do not accurately represent the traits of live cell behavior and cannot be genetically manipulated. UC San Diego professor Carol Marchetto discusses how a comparative gene expression analysis of human and non-human primates revealed differences in the regulation of a class of transposable elements (Long Interspersed Nuclear Element 1 or LINE1 retrotransposons) between species. (#37377)