Protein modifier SUMO helps in differentiating between males and femalesWalter Wahli and colleagues at the University of Lausanne, Switzerland, have been able to identify a new mechanism that underlies the differential expression of proteins in male and female mice.

The difference is in relation to expression of liver proteins controlling a large number of whole-body processes such as energy generation and steroid hormone production.

The research appeared in the Sept. 1, 2009 issue of the Journal of Clinical Investigation.