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Table 1.

MWC and derived parameters for Carcinus maenas hemolymph with 0,10 and 50 mmol l–1 L-lactate at 10°C

[L-lactate] (mmol l–1)pHP50 (mmHg)Pm (mmHg)n50nmaxlogKTlogSElogKRlogSElogLq*ΔG (kJ mol–1)
            
   0 7.83 7.81 7.83 3.4 3.4 –1.9651 0.05169 0.1483 0.0879 4.6990 4.51 11.39 
   10 7.85 4.66 4.69 2.6 2.6 –1.3854 0.0839 0.0128 0.1010 3.1980 4.67 7.51 
   50 7.85 3.00 3.11 2.0 2.0 –1.4589 0.2894 0.0903 0.0455 1.8727 3.22 7.45 
            
   0 7.83 7.69 7.70 3.2 3.2 –1.9861 0.0505 0.2055 0.0775 4.3670 11.84 
   10 7.85 4.63 4.67 2.4 2.4 –1.4364 0.0700 0.0495 0.0817 2.8739 7.90 
   50 7.85 3.00 3.10 2.2 2.2 –1.2314 0.0604 0.0708 0.0347 2.2671 6.77 
[L-lactate] (mmol l–1)pHP50 (mmHg)Pm (mmHg)n50nmaxlogKTlogSElogKRlogSElogLq*ΔG (kJ mol–1)
            
   0 7.83 7.81 7.83 3.4 3.4 –1.9651 0.05169 0.1483 0.0879 4.6990 4.51 11.39 
   10 7.85 4.66 4.69 2.6 2.6 –1.3854 0.0839 0.0128 0.1010 3.1980 4.67 7.51 
   50 7.85 3.00 3.11 2.0 2.0 –1.4589 0.2894 0.0903 0.0455 1.8727 3.22 7.45 
            
   0 7.83 7.69 7.70 3.2 3.2 –1.9861 0.0505 0.2055 0.0775 4.3670 11.84 
   10 7.85 4.63 4.67 2.4 2.4 –1.4364 0.0700 0.0495 0.0817 2.8739 7.90 
   50 7.85 3.00 3.10 2.2 2.2 –1.2314 0.0604 0.0708 0.0347 2.2671 6.77 

SE, standard errors (of KT and KRvalues); for other abbreviations, see text

*

The MWC model was fitted to the data with q (the number of interacting O2-binding sites) floating (A) or fixed at 4 (B)

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