Fig. 4.

Expression levels of CXCL11 receptors in developing and adult limb muscles a, b Western blotting allowed the detection of the CXCL11 receptors, a CXCR3 and b CXCR7, in the quadriceps muscle of embryonic to adult rats with a most prominent increase in expression levels between P3 and adulthood. a′, b′ Relative protein levels of a′ CXCR3 and b′ CXCR7 (mean ± SD, n = 3) as determined by densitometric analysis of immnoreactive protein bands. Protein levels present at E18 were set to 1. Note again that ß-actin and GAPDH, used as loading controls, are developmentally regulated (see Fig. 1). ^ap < 0.001, adult vs E18; ^bp < 0.01, adult vs. P3; ^cp < 0.001, adult vs. E18 or P3