Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Enzyme | Location | Substrate | Product | Chromosome | EC | OMIM | Porphyria |
| --- | --- | --- | --- | --- | --- | --- | --- |
| ALA synthase | Mitochondrion | Glycine , succinyl CoA | δ-Aminolevulinic acid | 3p21.1 | 2.3.1.37 | 125290.0 | none |
| ALA dehydratase | Cytosol | δ-Aminolevulinic acid | Porphobilinogen | 9q34 | 4.2.1.24 | 125270.0 | ALA-Dehydratase deficiency |
| PBG deaminase | Cytosol | Porphobilinogen | Hydroxymethyl bilane | 11q23.3 | 2.5.1.61 | 176000.0 | acute intermittent porphyria |
| Uroporphyrinogen III synthase | Cytosol | Hydroxymethyl bilane | Uroporphyrinogen III | 10q25.2-q26.3 | 4.2.1.75 | 606938.0 | congenital erythropoietic porphyria |
| Uroporphyrinogen III decarboxylase | Cytosol | Uroporphyrinogen III | Coproporphyrinogen III | 1p34 | 4.1.1.37 | 176100.0 | porphyria cutanea tarda |
| Coproporphyrinogen III oxidase | Mitochondrion | Coproporphyrinogen III | Protoporphyrinogen IX | 3q12 | 1.3.3.3 | 121300.0 | coproporphyria |
| Protoporphyrinogen oxidase | Mitochondrion | Protoporphyrinogen IX | Protoporphyrin IX | 1q22 | 1.3.3.4 | 600923.0 | variegate porphyria |
Question:
what is the subtrate for enzyme ala dehydratase
Answer:
δ-Aminolevulinic acid