含非极性侧链基团 含极性侧链基团 Nonpolar, aliphatic R groups Polar, uncharged R groups COO COO coo COO COO COO H3N--C-H H3N-C-H H3 N-C-H HgN-C--H HgN-C-H HSN-C--H CH CH CHoOR H-C-OB CH2 CH. ch SH Glycine Alanine Valin Serine Threonine Cysteine COO COO COO COO COO COO H3N-C--H H3N-C-H H3N-C-H H H8N-C-H HSN-C-H CH H-C-CHs HoN CHe CH H2C CH CH CHs CH3 CH H2N CHs HoN leucine Methionine Isoleucine Proline Asparagine Glutamine Gly,G Ala, A Val, V Ser, S Thr, T Cys, C Leu.l Met. m eI Pro, P Asn,N GIn, Q含非极性侧链基团 含极性侧链基团 Ser, S Thr, T Cys, C Pro, P Asn, N Gln, Q Gly, G Ala, A Val, V Leu, L Met, M Ile, I