Table 1.

WT and S100A1 KO Muscle morphological properties and protein expression

	Muscle Fiber Diameter, μm	MHC-Slow Fibers, % +	RyR1 Expression, %WT	SERCA Expression, %WT	Parvalbumin Expression, %WT
WT	40.8 ± 1.0	10.3 ± 2.1
KO	39.4 ± 0.8	11.1 ± 2.1	99.5 ± 11.1*	97.2 ± 4.1*	104.6 ± 20.4*

Values are means ± SE.

^*Values are means ± SD. WT, wild type; KO, knockout; MHC, myosin heavy chain; RyR, ryanodine receptor type-1; SERCA, sarcoplasmic reticulum Ca²⁺ ATPase.