) is an enzyme that catalyzes the chemical reaction 1-(2-carboxyphenylamino)-1-deoxy-D-ribulose 5-phosphate 1-C-(indol-3-yl)-glycerol 3-phosphate + CO 2 + H 2 O Hence, this enzyme has one substrate , 1-(2-carboxyphenylamino)-1-deoxy-D-ribulose 5-phosphate , but 3 products : 1-C-(indol-3-yl)-glycerol 3-phosphate , CO 2 , and H 2 O . This enzyme belongs to the family