text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_182499_1 (substrate VARCHAR, enzyme VARCHAR)
  ### Question:
  what is the subtrate for enzyme ala dehydratase
  ### Answer:
  SELECT substrate FROM table_182499_1 WHERE enzyme = "ALA dehydratase"