I am very confused about what one 'Katal' actually is. From Wikipedia,
"The katal is not used to express the rate of a reaction; that is expressed in units of concentration per second (or moles per liter per second). Rather, it is used to express catalytic activity which is a property of the catalyst. The katal is invariant of the measurement procedure, but the numerical quantity value is not and depends on the experimental conditions. Therefore, in order to define the quantity of a catalyst, the rate of conversion of a defined chemical reaction is specified as mols reacted per second. One katal of trypsin, for example, is that amount of trypsin which breaks a mole of peptide bonds per second under specified conditions."
So if a Katal is a specific AMOUNT of trypsin, then why is it expressed in units of moles per second. This is not dimensionally consistent! An 'amount' could be expressed as moles or mass, but certainly not as moles per second which is like a rate of reaction multiplied by volume...? The units and definition just seem to be all wrong.
If I were to take it that the Katal is the amount of enzyme catalysing one mole of a reaction per second, then this would mean that an enzyme with a smaller number of Katals of activity would actually be more active because less of it is required to catalyse one mole of the reaction per second?