Fig. 4

Responses of the maximum binding capacity of β₂-adrenoceptors in rat soleus to hindlimb unloading and/or supplementation of creatine or its analog, β-guanidinopropionic acid (β-GPA). Mean ± SEM. * and **: p < 0.05 and 0.01 vs. ground control; ^† and ^††: p < 0.05 and 0.01 vs. the respective group in the control diet group. Cited from [23]