In enzymology, a 1-methyladenosine nucleosidase is an enzyme that catalyzes the chemical reaction 1-methyladenosine + H2O ⇌ {\displaystyle \rightleftharpoons } 1-methyladenine + D-riboseThus, the two substrates of this enzyme are 1-methyladenosine and H2O, whereas its two products are 1-methyladenine and D-ribose. Wikipedia