Fischer found that the enzyme “invertase,” which is present in yeast, attacks methyl-d-glucoside but not methyl-l-glucoside.
The optimum temperature for invertase is 50° to 54°; it is killed if heated, in the moist condition, to 70°.
When hydrolyzed by acids, or by the enzyme "invertase," it yields a mixture of equal quantities of glucose and fructose.
invertase in·ver·tase (ĭn-vûr'tās', ĭn'vər-tās', -tāz')
An enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose. Also called beta-fructofuranosidase, invertin, saccharase, sucrase.