TABLE 4.

Summary of the properties of the ALDH complex from Komagataeibacter polyoxogenes strain NBI1028 and the AldGH subcomplex of Gluconacetobacter diazotrophicus strain PAL5^a

Property	Value in studyd
	Fukaya et al.a	This study
Specific FC3− reductase activity (U mg−1)b	800	100
Optimum pH for FC3− reductase activity	7.0	7.0c
Presence of ubiquinone reductase	NI	No
Sizes of subunits	Large and small	Large and small
Presence of cytochromes	No	No
Absorption shoulder (nm)	∼480	∼480
Presence of absorption changes upon redox	NI	Yes

^aKomagataeibacter polyoxogenes strain NBI1028 was formerly referred to as Acetobacter polyoxogenes (19).

^bAldGH activity was routinely determined at pH 5.0 in this study but at pH 6.0 in the study by Fukaya et al. The ferricyanide reductase activity at pH 5.0 would be half of that at pH 6.0.

^cThe ferricyanide reductase activity at pH 8.0 was higher than that at pH 7.0, but a weak chemical reduction of ferricyanide by acetaldehyde occurred. We tentatively conclude that pH 7.0 is optimal for the ferricyanide reductase activity of the AldGH subcomplex.

^dNI, no information.