In enzymology, an alpha-factor-transporting ATPase is an enzyme that catalyzes the chemical reaction ATP + H2O + alpha-factorin ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + alpha-factoroutThe 3 substrates of this enzyme are ATP, H2O, and alpha-factor, whereas its 3 products are ADP, phosphate, and alpha-factor. Wikipedia