Quantitative PCR for transcript abundance of tgfβ1, alk1, alk5, and tgfβ1RII in unwounded and wounded skin from WT, ts5−/−, ts5−/−/Cd44−/−, and Cd44−/− mice. RNA preparation and PCRs for transcript abundance was performed as described under “Experimental Procedures.” Data for wounded tissue (at day 4 = granulation tissue; day 8 = contraction; and day 15 = dermal regeneration) are expressed as mRNA abundance (arbitrary units) relative to the unwounded (UW) wild type value, which was set at unity. Each data point represents the mean ± S.D. of triplicate assays from three individual mice. See also supplemental Table 1 for basal level expression of all genes in all mice lines. Asterisk indicates the restoration of gene expression to WT values.