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Z Klin Chem Klin Biochem. 1975 Nov;13(11):507-8.

[New values for the molar extinction coefficients of NADH and NADPH for the use in routine laboratories (author's transl)].

[Article in German]

Abstract

Extensive re-investigations with regard to the molar extinction coefficients of NADH and NADPH proved that in future, calculations in routine work can be performed with the following much more accurate epsilon-values: 6.15 x 10(3) 1 x mol-1 x cm-1 at Hg 334 nm (NADH and NADPH), 6.3 X 10(3) 1 X mol-1 x cm-1 at 340 nm (NADH and NADPH), 3.4 X 10(3) 1 X mol-1 X Cm-1 (NADH) and 3.5 x 10(3) 1 x mol-1 x cm-1 (NADPH) at Hg 365 nm, respectively. The safest measurement is performed at Hg 334 nm, because here epsilon is identical for both coenzymes and deviations of the epsilon-value caused by temperature, pH and ionic strength are less than 0.5%.

PMID:
3038
[Indexed for MEDLINE]

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