Enzymes cont.
	• the presence of inhibitors. – competitive inhibitors are molecules that bind to the same site as the substrate - preventing the substrate from binding as they do so - but are not changed by the enzyme. – noncompetitive inhibitors are molecules that bind to some other site on the enzyme reducing its catalytic power. • pH. The conformation of a protein is influenced by pH and as enzyme activity is crucially dependent on its conformation, its activity is likewise affected.