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