CREATE TABLE table_49140 ("E. coli" TEXT, "Yeast  ( S. cerevisiae ) " TEXT, "Human" TEXT, "Type" TEXT, "Substrates" TEXT)

What is the type of glycosylase that has an E. coli of Muty?
SELECT "Type" FROM table_49140 WHERE "E. coli" = 'muty'
SELECT "Type" FROM "table_49140" WHERE "E. coli" = 'muty'