Analyses of cell differentiation markers. (A) Levels of runx2, PPARγ, sox-9, and myocardin per PEG-PDMSstar formulation, and (B) levels of osteocalcin, A-FABP, collagen II, and SM22α per PEG-PDMSstar gel type. Results were normalized to the 100:0 PEG-PDMSstar formulation for the purpose of comparison. *Significantly different from 100:0 gels; #significantly different from 95:5 gels; ζsignificantly different from 95:0 gels; ξsignificantly different from 80:0 gels. Samples per assay: n=3–6 per formulation.