CREATE TABLE table_49142 ("E. coli" CLOB, "Yeast  ( S. cerevisiae ) " CLOB, "Human" CLOB, "Type" CLOB, "Substrates" CLOB)

Which E. coli has a substrate of uracil?
SELECT "E. coli" FROM table_49142 WHERE "Substrates" = 'uracil'
SELECT "E. coli" FROM "table_49142" WHERE "Substrates" = 'uracil'