D. Western blot analysis of IRS1, p-P70S6K (T389), P70S6K, p-JNK (Y185), JNK1/2 proteins in growth plate lysates of mice with indicated genotypes. N=3 mice/genotype. β-actin was used as loading control. Bar graph shows quantification. Mean +/- standard error of the mean (sem). Student's un-paired T-test *p<0.05. 