normal phenotype
• mice are viable and are born at the expected genotype and sex ratios, exhibit normal body weight and body composition, normal glucose tolerance at 2-3 months of age, no differences in muscle-intrinsic properties in ex vivo muscle contraction assays, and no differences in ex vivo aorta contraction tests or in blood pressure
• of note, females, but not males, show slightly higher exercise capacity but not significantly
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