Acknowledgements
We thank Vince De Vera for mouse care and Alma Islas-Trejo, Kerri Morimoto, Gonzalo Rincon, Ricardo Verdugo, Karina Guevara, James Chitwood, Lee Nguyen, Galen Williams and Emily Farber for assistance with mouse phenotyping. We also thank Scott Taylor and Dr. Ed DePeters for assistance and use of the UCD Animal Science Nutrition Laboratory for carcass composition analysis. This work was supported by the National Research Initiative of the USDA Cooperative State Research, Education and Extension Service, grant number 2005–35205–15453. CRF was supported by the Austin Eugene Lyons fellowship.