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        Hello everybody,

        We are studying gels composed of polysaccharides (pectins) and protein
(BSA). Pectins are gelling upon addition of calcium ions, but calcium can
also be adsorbed on proteins. All the interactions are of electrostatic
nature. We are interested by labelling the calcium in order to localize it
in the blends. However, the dye should not interact with  ions by
electrostatic interactions.
        Can someone help us?

        Thank you very much in advance

        Catherine
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Dr Catherine Garnier
INRA-LPCM
Rue de la Geraudiere
BP 71627
44 316 Nantes Cedex 03
France
Phone: Int-33-2-40-67-50-45
Fax: Int-33-2-40-67-50-43
http://www.nantes.inra.fr/public/unites_recherche/upcm/upcm.htm
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