CREATE TABLE "biosynthesis" (
  "enzyme" text,
  "location" text,
  "substrate" text,
  "product" text,
  "chromosome" text,
  "ec" text,
  "omim" real,
  "porphyria" text
);

Question: what is the subtrate for enzyme ala dehydratase
SQL: SELECT "substrate" FROM "biosynthesis" WHERE "enzyme"='ALA dehydratase';

Question: how many porphyria have substrate δ-aminolevulinic acid
SQL: SELECT COUNT("porphyria") FROM "biosynthesis" WHERE "substrate"='δ-Aminolevulinic acid';

Question: give the location of subtrate coproporphyrinogen iii
SQL: SELECT "location" FROM "biosynthesis" WHERE "substrate"='Coproporphyrinogen III';