forward unimolecular rate constant, continuous case total catalytic efficiency <n0:math xmlns:n0="http://www.w3.org/1998/Math/MathML"> <n2:lambda xmlns:n2="http://biomodels.net/SBO/"> <n2:bvar><n2:ci definitionURL="http://biomodels.net/SBO/#SBO:0000186">Vmax</n2:ci></n2:bvar> <n2:bvar><n2:ci definitionURL="http://biomodels.net/SBO/#SBO:0000027">Km</n2:ci></n2:bvar> <n2:apply> <n2:divide /> <n2:ci>Vmax</n2:ci> <n2:ci>Km</n2:ci> </n2:apply> </n2:lambda> </n0:math> Constant representing the actual efficiency of an enzyme at a given concentration, taking into account its microscopic catalytic activity and the rates of substrate binding and dissociation. NB. The symbol Vmax and the names maximum rate and maximum velocity are in widespread use although under normal circumstances there is no finite substrate concentration at which v = V and hence no maximum in the mathematical sense (Eur. J. Biochem. 128:281-291).