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 (porphyria VARCHAR, substrate VARCHAR)
  ### Question:
  how many porphyria have substrate δ-aminolevulinic acid
  ### Answer:
  SELECT COUNT(porphyria) FROM table_182499_1 WHERE substrate = "δ-Aminolevulinic acid"