抄録
NADH dehydrogenase (EC 1.6.99.3), which catalyzes the first reaction of the NADH oxidase system known to operate actively at low temperature in Vibrio sp. strain ABE-1, was examined in respect of intracellular distribution, temperature- and salts-dependencies, and so on.
Almost the same amount of the enzyme was distributed in the cytoplasmic and membrane fractions, and the enzymes in the two fractions were presumed to be different ones by virtue of their properties such as optimum pH, salts- and temperature-dependencies.
Both enzymes were unique in that they were able to function at a remarkably high rate under lower temperatures: the activities at 5° were about 70% of the respective maximum activities.
