G In the absence of allosteric effectors, the enzyme phosphofructokinase displays Michaelis–Menten kinetics (see Fig. 7.15). The v0/Vmax ratio is 0.90 when the concentration of the substrate, fructose-6-phosphate, is 0.10 mM. Calculate the KM for phosphofructokinase under these conditions (in units of mM).

The value of the Michaelis–Menten constant is 0.0111 mM.

Explanation:

Michaelis–Menten 's equation:

Where:

= rate of formation of products

[S] = Concatenation of substrate

=  Michaelis constant

 = Maximum rate achieved

= Catalytic rate of the system

= Initial concentration of enzyme

On substituting all the given values

We have :

[S] = 0.10 mM

The value of the Michaelis–Menten constant is 0.0111 mM.

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