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What unit of enzyme amount is Vmax standardized to? - (Sep/22/2013 )

So Vmax is the maximal rate of a reaction.  Is this normalized to a certain amount of enzyme? 

-Ahrenhase-

It is proportional to the concentration of the enzyme.  The first few lines of the wiki article here will help: http://en.wikipedia.org/wiki/Michaelis%E2%80%93Menten_kinetics

-bob1-

It is proportional to the concentration of the enzyme.  The first few lines of the wiki article here will help: http://en.wikipedia.org/wiki/Michaelis%E2%80%93Menten_kinetics

But when they report the Kms of different enzyme/subtrates, it has to be standardized to a specific enyzme concentration in some way, no?  The Km will be lower if you have 10x more enzyme

-Ahrenhase-

IIRC, Vmax should be under saturating conditions, so the rate won't change, the only thing that should change is how quickly the reaction will reach Vmax .

-bob1-