> Don't forget all the sulfate groups attached to the GAGs.
>> <DOCTORHIM at aol.com> wrote in message news:9.1183c7fd.27cc4bfc at aol.com...> > They are negatively charged due to carboxylic acids on molecules such as
> > glucuronic acid and galacturonic acid. The charge is -1 for each
> > acid. The pI would depend of the number of acid residues since they are
> > heterogenous.
> > ---