text: The "ping-pong" mechanism is used to explain the mechanism of some of these molecules.
full_question: The "ping-pong" mechanism is used to explain the mechanism of some of these molecules. Lineweaver-Burk plots are used to find Km ["k-sub-m"] and Vmax ["v-max"] which are constants that characterize these molecules. Those plots model these molecules using Michaelis-Menten kinetics and can distinguish whether inhibitors of these molecules are non-competitively acting at allosteric sites. These molecules are thought to bind to their targets via the "induced fit" mechanism. These molecules generally have names ending with "-ase" ["ace"] and act upon a specific substrate at their active sites. For 10 points, name these proteins that serve as biological catalysts.
first_sentence: The "ping-pong" mechanism is used to explain the mechanism of some of these molecules.
raw_answer: enzymes [prompt on "proteins"; prompt on "catalysts" before mention]