Revised determination of free and complexed myrosinase activities in plant extracts

Travers-Martin N, Kuhlmann F, Müller C (2008)
PLANT PHYSIOLOGY AND BIOCHEMISTRY 46(4): 506-516.

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Abstract
The enzyme myrosinase (thioglucoside glucohydrolase, EC 3.2.1.147, formerly EC 3.2.3.1) catalyzes the hydrolysis of glucosinolates after tissue damage in plants of the order Brassicales. The various myrosinase isoforms occur either as free soluble dimers or as insoluble complexes. We propose a reliable method for determination of both soluble and insoluble myrosinase activity concentrations in partially purified plant extracts. The procedure requires the removal of endogenous glucosinolates through ion-exchange columns previous to enzyme measurements. Myrosinase activity was assayed in continuous mode by photometric quantification of the released glucose using glucose-oxidase with peroxidase and colorimetric indicators. The measurement of the colored product at 492 nm has a favorable signal to noise ratio both in clear extract solutions (free dinners) and in turbid pellet suspensions (insoluble complexes). No interferences by ascorbic acid were found in continuous analyses. With the recommended sample preparation methods and assay conditions potential activities in damaged plant tissues can be characterized which are involved in plant defense mechanisms. (C) 2008 Elsevier Masson SAS. All rights reserved.
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Travers-Martin N, Kuhlmann F, Müller C. Revised determination of free and complexed myrosinase activities in plant extracts. PLANT PHYSIOLOGY AND BIOCHEMISTRY. 2008;46(4):506-516.
Travers-Martin, N., Kuhlmann, F., & Müller, C. (2008). Revised determination of free and complexed myrosinase activities in plant extracts. PLANT PHYSIOLOGY AND BIOCHEMISTRY, 46(4), 506-516.
Travers-Martin, N., Kuhlmann, F., and Müller, C. (2008). Revised determination of free and complexed myrosinase activities in plant extracts. PLANT PHYSIOLOGY AND BIOCHEMISTRY 46, 506-516.
Travers-Martin, N., Kuhlmann, F., & Müller, C., 2008. Revised determination of free and complexed myrosinase activities in plant extracts. PLANT PHYSIOLOGY AND BIOCHEMISTRY, 46(4), p 506-516.
N. Travers-Martin, F. Kuhlmann, and C. Müller, “Revised determination of free and complexed myrosinase activities in plant extracts”, PLANT PHYSIOLOGY AND BIOCHEMISTRY, vol. 46, 2008, pp. 506-516.
Travers-Martin, N., Kuhlmann, F., Müller, C.: Revised determination of free and complexed myrosinase activities in plant extracts. PLANT PHYSIOLOGY AND BIOCHEMISTRY. 46, 506-516 (2008).
Travers-Martin, Nora, Kuhlmann, Franziska, and Müller, Caroline. “Revised determination of free and complexed myrosinase activities in plant extracts”. PLANT PHYSIOLOGY AND BIOCHEMISTRY 46.4 (2008): 506-516.
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12 Citations in Europe PMC

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