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Table II.

Summary of surface density estimates



Myosin

ATPase rate

Myosin density

Available heads

 
μg/ml
 
nM/min
 
heads/μm2
 
heads/μm actin
 
M5HMM 0.03 72 3.7 
M5HMM 0.09 215 11.1 
Myosin IIa 0.35 270 7.0 
Myosin IIa
 
10
 
0.67
 
514
 
13
 


Myosin

ATPase rate

Myosin density

Available heads

 
μg/ml
 
nM/min
 
heads/μm2
 
heads/μm actin
 
M5HMM 0.03 72 3.7 
M5HMM 0.09 215 11.1 
Myosin IIa 0.35 270 7.0 
Myosin IIa
 
10
 
0.67
 
514
 
13
 
a

Smooth muscle myosin II data taken from Harris and Warshaw, 1993.

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