I have seen many times the following phase describing
glycosaminoglycans: they are hetropolysaccharides that are highly
negatively charged. Do glycosaminoglycans have isoelectric points and if
so what are they for the chondroitin, dermatin, keratin, and heperain
sulfates and what do they mean by highly negatively charged molecules?
Is there a value they assign to the charge when they say they have a