title: [Spectrophotometric study on the interaction of protein with acid dye].
abstract: Spectrophotometric characters of protein interaction with chromazurol S(CAS), bromocresol green (BCG), bromopyrogallol red (BPR) and methylthymol blue (MTB) have been studied in acid and alkaline medium respectively. Protein can combine the above mentioned dye to reduce absorptivity of dye solution of CAS and BCG at pH 3.8 and pH 4.0, to add absorptivity of dye solution of BPR and MTB at pH 3.8 and pH 10.8 for the bathochromic shift of wave length of maximal absorption of them to add 10 nm and 20 nm respectively. The linear relationship holds between the reduced or added absorptivity of dye and the optimum concentration range of protein. The interaction mechanism of protein and dye has been discussed tentatively.
authors.affiliation: Department of Chemical Engineering, Guangdong University of Technology, 510090 Guangzhou.
authors.forename: Z
authors.initials: Z
authors.lastname: Luo
authors.forename: K
authors.initials: K
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Cui
authors.forename: F
authors.initials: F
authors.lastname: Dong
mesh_terms: D000143:Acids; D001961:Bromcresol Green / Q000737:chemistry; D001979:Bromthymol Blue / Q000031:analogs & derivatives* / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D004347:Drug Interactions; D006863:Hydrogen-Ion Concentration; D062385:Hydroxybenzoates / Q000737:chemistry*; D007202:Indicators and Reagents; D011485:Protein Binding; D011506:Proteins / Q000737:chemistry*; D011748:Pyrogallol / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods
chemical_list: D000143:Acids; D004396:Coloring Agents; D062385:Hydroxybenzoates; D007202:Indicators and Reagents; D011506:Proteins; D011748:Pyrogallol; C015076:chrome azurol S; C002074:methylthymol blue; D001961:Bromcresol Green; D001979:Bromthymol Blue