Characterization of erythrosine B binding to bovine serum albumin and bilirubin displacement

Mathavan, Vinodaran M.K. and Boh, Boon Kim and Tayyab, Saad (2008) Characterization of erythrosine B binding to bovine serum albumin and bilirubin displacement. Indian Journal of Biochemistry & Biophysics, 46 (4). pp. 325-331. ISSN 0301-1208,

Full text not available from this repository.
Official URL:


The interaction of erythrosine 13 (ErB), a commonly used dye for coloring foods and drinks, with bovine serum albumin (BSA) was investigated both in the absence and presence of bilirubin (BR) using absorption and absorption difference spectroscopy. ErB binding to BSA was reflected from a significant red shift of 11 nm in the absorption maximum of ErB (527 um) with the change in absorbance at λmax. Analysis of absorption difference spectroscopic titration results of BSA with increasing concentrations of ErB using Benesi-Hildebrand equation gave the association constant, K as 6.9 × 104 M-1. BR displacing action of ErB was revealed by a significant blue shift in the absorption maximum, accompanied by a decrease in absorbance difference at λmax in the difference spectrum of BR-BSA complex upon addition of increasing concentrations of ErB. This was further substantiated by fluorescence spectroscopy, as addition of increasing concentrations of ErB to BR-BSA complex caused a significant decrease in fluorescence at 510 nm. The results suggest that ErB binds to a site in the vicinity of BR binding site on BSA. Therefore, intake of ErB may increase the risk of hyperbilirubinemia in the healthy subjects.

Item Type: Article
Uncontrolled Keywords: Absorption spectroscopy; Bilirubin displacement; Bovine serum albumin; Erylhrosine B
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Dec 2020 05:01
Last Modified: 14 Dec 2020 05:01

Actions (login required)

View Item View Item