title: Spectrophotometric study of the relative affinities of teichoic acid for different metal ions.
abstract: Spectrophotometric study of the relative affinities of teichoic acid (TA) for Na+, Ca2+, Mg2+, Cd2+, Hg2+, Cu2+ and Pb2+ described on the basis of the disruption of metachromasia of dye 1,9-dimethyl methylene blue (DMMB)-polyanion (TA) system has revealed the following sequence of relative affinities of TA for these metals: Na+ < Ca2+ < or = Mg2+ < Cd2+ < Hg2+ < Cu2+ < Pb2+. Some of the metal ions particularly Pb2+ and Hg2+ have specific interactions with the dye, and induce distinct metachromatic band of the dye even in the absence of the polyanion.
authors.affiliation: Department of Biochemistry and Biophysics, University of Kalyani, India.
authors.forename: M K
authors.initials: MK
authors.lastname: Pal
authors.forename: S
authors.initials: S
authors.lastname: Das
mesh_terms: D002413:Cations, Divalent / Q000737:chemistry; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry; D013053:Spectrophotometry; D013211:Staphylococcus aureus; D013682:Teichoic Acids / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D002413:Cations, Divalent; D008670:Metals; D013682:Teichoic Acids; D012964:Sodium