Fig. 3

Differences in the composition of myofibres in quadriceps muscles of wild-type (WT) and STAT5B^−/− mice. Mean percentages (± SEM) of total myosin heavy chain (MHC) fibres for a type 2b, b type 2x, c type 2a, and d type 1 myofibres in quadriceps muscles of male WT (black bars), male STAT5B^−/− (light grey bars), female WT (dark grey bars), and female STAT5B^−/− (white bars) mice at 6, 12, and 24 weeks of age (n = 8 per group). Unlike letters within each graph denote significant differences (P < 0.05) between groups at each age only. e Representative bands of the MHC gel electrophoresis for each group are also presented