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Pseudo-First-Order Kinetics

Kinetic behavior observed when the substrate concentration is much lower than Km, simplifying the rate law.

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The statement of the theorem

Let

[S]_0

be the initial substrate concentration. If

[S]_0 \gg K_m

, the Michaelis-Menten rate law simplifies to a pseudo-first-order rate constant

k_{obs}

: \n

v = k_{obs}[S]

\nwhere

k_{obs} = \frac{V_{max}}{[S]_0}