Expression levels estimated with Affymetrix MAS4.0 are in file AvgDif.txt; Expression levels estimated with dChip are in file dChip.txt; Differentially expressed genes are listed in file DifferLists.xls. There are four sheets in this file, each for one of the four tissues. The first raw of each file lists samples studied. The sample labels are: B6F1 B6-ob/ob, adipose tissue, replicate 1 B6F2 B6-ob/ob, adipose tissue, replicate 2 BTBRF1 BTBR-ob/ob, adipose tissue, replicate 1 BTBRF2 BTBR-ob/ob, adipose tissue, replicate 2 B6L1 B6-ob/ob, liver, replicate 1 B6L2 B6-ob/ob, liver, replicate 2 BTBRL1 BTBR-ob/ob, liver, replicate 1 BTBRL2 BTBR-ob/ob, liver, replicate 2 B6M1 B6-ob/ob, skeletal muscle, replicate 1 B6M2 B6-ob/ob, skeletal muscle, replicate 2 BTBRM1 BTBR-ob/ob, skeletal muscle, replicate 1 BTBRM2 BTBR-ob/ob, skeletal muscle, replicate 2 B6P1 B6-ob/ob, pancreatic islets, replicate 1 B6P2 B6-ob/ob, pancreatic islets, replicate 2 BTBRP1 BTBR-ob/ob, pancreatic islets, replicate 1 BTBRP2 BTBR-ob/ob, pancreatic islets, replicate 2 For questions, please contact Hong Lan at 608-262-4705 or hlan@facstaff.wisc.edu.