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"