all the following are non-competitive inhibitors except ?

Enzyme Inhibitors * Competitive inhibitors bind to the active site of an enzyme, competing with the substrate ex: arsenate ,oxamate,malonate, sulfonamide,methotrexate,ethanol,dicumurol * Noncompetitive inhibitors bind to another pa of an enzyme, causing the enzyme to change shape and making the active site less effective * Examples of inhibitors include toxins, poisons, pesticides, and antibiotics = iodoactate,NaF, fluroacetate, arsenate,cyanide, disulfuram ref : vasudevan 9th ed