If "k" inhibits activity of enzyme "5", then enzyme "5" is under ___ control. if enzyme "3" becomes activated in response to activity of protein kinase a only when compound "a" is present, then enzyme "3" is under ___ control. if enzyme "2" is only expressed in the presence of high concentrations of "a," then enzyme "2" is under ___ control. if all of these are true, high concentrations of "__" will decrease the flux through the pathway.
