The CEL files used in this study (Shockley et al., 2007) are: 72 AV 8-20-04.CEL 72 DV 8-20-04.CEL REM 72 BR 6-09-04.CEL REM 72 BV 6-09-04.CEL REM 72 CR 6-09-04.CEL REM 72 CV 6-09-04.CEL The full data set is analyzed in "Shockley KR, Lazarenko OP, Czernik PJ, Rosen CJ, Churchill GA, Lecka-Czernik B. PPARgamma2 nuclear receptor controls multiple regulatory pathways of osteoblast differentiation from marrow mesenchymal stem cells. J. Cell. Biochem." (in press January 2009)