Which E. coli has a substrate of uracil?
CREATE TABLE table_49142 (
    "E. coli" text,
    "Yeast (S. cerevisiae)" text,
    "Human" text,
    "Type" text,
    "Substrates" text
)
SELECT "E. coli" FROM table_49142 WHERE "Substrates" = 'uracil'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Which E. coli has a substrate of uracil? ### Input: CREATE TABLE table_49142 (
    "E. coli" text,
    "Yeast (S. cerevisiae)" text,
    "Human" text,
    "Type" text,
    "Substrates" text
) ### Response: SELECT "E. coli" FROM table_49142 WHERE "Substrates" = 'uracil'