4-trimethylaminobutyraldehyde dehydrogenase jẹ́ enzyme nínú ara àwọn ènìyàn tí ALDH9A1 gene máa ń kóòdù fún. "Human aldehyde dehydrogenase: chromosomal assignment of the gene for the isozyme that metabolizes gamma-aminobutyraldehyde". Hum Genet 93 (2): 211–2. Mar 1994. doi:10.1007/bf00210615. PMID 8112751.  "Human gamma-aminobutyraldehyde dehydrogenase (ALDH9): cDNA sequence, genomic organization, polymorphism, chromosomal localization, and tissue expression". Genomics 34 (3): 376–80. Sep 1996. doi:10.1006/geno.1996.0300. PMID 8786138.  "Entrez Gene: ALDH9A1 aldehyde dehydrogenase 9 family, member A1".