Table 2.

Affinity of ALDHs for acetaldehyde and retinaldehyde

S.No.	ALDH isozyme(s)	Substrate	Km	Reference
1	ALDH1A1	Acetaldehyde	180 µM	[14]
		All-trans Retinaldehyde 9-cis Retinaldehyde	11.6–26.8 µM 3.59 µM	[90], Jackson et al, under preparation.
2	ALDH1A2	All-trans Retinaldehyde 9-cis Retinaldehyde	0.66 µM 0.62 µM	[91]
3	ALDH1A3	All-trans Retinaldehyde	0.2 µM	[92]
4	ALDH1B1	Acetaldehyde	55 µM	[14]
		Retinaldehyde	24.9 µM	Jackson et al., under preparation
5	ALDH2	Acetaldehyde	3.2 µM	[14]
6	ALDH8A1	9-cis Retinaldehyde	3.15 µM	[45]