<Tr> <Td> Hydrophilic </Td> <Td> </Td> <Td> ζ </Td> <Td> S, T, H, N, Q, E, D, K, R </Td> </Tr> <Tr> <Td> Positively charged </Td> <Td> </Td> <Td> + </Td> <Td> K, R, H </Td> </Tr> <Tr> <Td> Negatively charged </Td> <Td> </Td> <Td> − </Td> <Td> D, E </Td> </Tr> <P> Unk is sometimes used instead of Xaa, but is less standard . </P>

What do amino acids fatty acids and glucose have in common