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Table 1.

Estimated mean displacement of oxymyoglobin molecules in the sarcoplasm during the time that an oxygen molecule is resident

ProteinTemperature (°C)Oxygen dissociation rate (s-1)t½ (ms)Mean displacementa(μm)
Sperm whale myoglobin 20 12 60 20 
 37 60 12 12 
Blue fin tuna myoglobin 25 104 6.7 
Blue marlin myoglobin 25 84 8.3 
Soybean leghemoglobin 20 5.6 120 30 
ProteinTemperature (°C)Oxygen dissociation rate (s-1)t½ (ms)Mean displacementa(μm)
Sperm whale myoglobin 20 12 60 20 
 37 60 12 12 
Blue fin tuna myoglobin 25 104 6.7 
Blue marlin myoglobin 25 84 8.3 
Soybean leghemoglobin 20 5.6 120 30 
a

Calculated from the relation <r2>=6Dt,where r is the displacement in time t, and time tis taken as the half-time for oxygen dissociation. The diffusion coefficients(D) used are those given by Papadopoulos et al.(2000).

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