<Tr> <Td> N - Acetylglucosamine </Td> <Td> Aminohexose </Td> <Td> GlcNAc </Td> </Tr> <Tr> <Td> N - Acetylneuraminic acid </Td> <Td> Aminononulosonic acid (Sialic acid) </Td> <Td> NeuNAc </Td> </Tr> <Tr> <Td> Xylose </Td> <Td> Pentose </Td> <Td> Xyl </Td> </Tr> <P> The sugar group (s) can assist in protein folding or improve proteins' stability . </P>

What roles do the following inorganic substances play in the cell