title: Colorimetric assay method for determination of the tannin acyl hydrolase (EC 3.1.1.20) activity.
abstract: A new colorimetric method of tannase (tannin acyl hydrolase, EC 3.1.1.20) assay has been developed using its specific substrate tannic acid. It is based on the changes in optical density of substrate tannic acid after enzymatic reaction at 530 nm. The residual tannic acid was measured by a modified BSA precipitation method. This assay is very simple, reproducible, and very convenient, and with it tannase activity can be measured in relation to the growth of the organism.
authors.affiliation: Microbiology Laboratory, Department of Botany & Forestry, Vidyasagar University, Midnapore 721 102, West Bengal, India.
authors.forename: K C
authors.initials: KC
authors.lastname: Mondal
authors.forename: D
authors.initials: D
authors.lastname: Banerjee
authors.forename: M
authors.initials: M
authors.lastname: Jana
authors.forename: B R
authors.initials: BR
authors.lastname: Pati
mesh_terms: D002265:Carboxylic Ester Hydrolases / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods; D047348:Hydrolyzable Tannins / Q000032:analysis / Q000737:chemistry; D015394:Molecular Structure; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D047348:Hydrolyzable Tannins; D002265:Carboxylic Ester Hydrolases; C022711:tannase