C00 C00 C00 C00 HaN-C-H HaN-C-H HsN C-H HgN-C-H CH2OH H-C-OH 极性不带电荷氨基酸7 CH2 CHs SH Glycine Serine Threonine Cysteine COO C00 C00 H一C一H HN-C-H HsN-C-H CH2 CH2 CH2 CH2 OH H2N Tyrosine Asparagine Glutamine极性不带电荷氨基酸7