QUANTIFICATION OF LUPIN PEROXIDASE ISOENZYMES BY DENSITOMETRY

Authors

  • A. Ros Barceló
Keywords: densitometry, isoperoxidases, lupin, quantification

Abstract

The formation of benzidine-brown end product by lupin peroxidase isoenzymes, separated by gel isoelectric focusing, is used in order to quantify isoenzyme activities on the same gel. Incubation times of 3 h, H2O2 concentration of 1mh, benzidine as saturated solution, and pH 5.0, are the best assay conditions. Under these conditions, isoperoxidase activity can be quantified as formation (and/or accumulation) of the benzidine-brown end product in the steady-state of the reaction. The product can be measured as the peak area recorded by scanning densitometry at 460 nm. Linear relationship between the amount of total peroxidase activity loaded on the top of the gel, and the area of each isoperoxidase peak resolved by gel isoelectric focusing support the validity of this densitometric method for the quantification of lupin peroxidase isoenzymes.

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Author Biography

A. Ros Barceló

Departamento de Biología Vegetal (Fisiología Vegetal) Facultad de Biología Universidad de Murcia
How to Cite
Ros Barceló, A. (1987). QUANTIFICATION OF LUPIN PEROXIDASE ISOENZYMES BY DENSITOMETRY. Anales de Biología, (14), 33–38. Retrieved from https://revistas.um.es/analesbio/article/view/34831
Issue
Section
Biología general