user: ### NOW ANSWER:
Question: Which E. coli has a substrate of uracil?
Columns: ['E. coli', 'Yeast (S. cerevisiae)', 'Human', 'Type', 'Substrates']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['AlkA', 'Mag1', 'MPG', 'monofunctional', '3-meA, hypoxanthine']
SQL:

assistant: SELECT "E. coli" FROM "Table" WHERE "Substrates" = 'uracil';