Question: what is the subtrate for enzyme ALA dehydratase
SQL: SELECT "Substrate" FROM "1-182499-1" WHERE "Enzyme" = 'ALA dehydratase';

Question: how many porphyria have substrate δ-Aminolevulinic acid
SQL: SELECT COUNT("Porphyria") FROM "1-182499-1" WHERE "Substrate" = 'δ-Aminolevulinic acid';

Question: give the location of subtrate Coproporphyrinogen III
SQL: SELECT "Location" FROM "1-182499-1" WHERE "Substrate" = 'Coproporphyrinogen III';