Figure 4. Insulin like growth factor-1 (IGF-1) receptor phosphorylation does not change in β1-adrenergic receptor knockout retina. Representative blots and bar graph of phosphorylated IGF-1 receptor (Tyr 1135/1136) and total IGF-1 receptor protein levels in retinal lysates in the β1-adrenergic receptor knockout (KO) mice and the wild-type (WT) controls. Bar graph is the ratio of phosphorylated protein to total protein levels. *Significance was found at p<0.05 versus wildtype samples. Animal numbers (N) is equal to 6.