Structure and Property of the Naturally-Occurring Amino Acids
- Page ID
- 4687
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)| Amino Acid | 3 Letter Code | 1 Letter Code | Structure | pKa1 (α-carboxyl) | pka2 (α-amino) | pka3 (side chain) |
| Nonpolar Side Chains | ||||||
| Glycine | Gly | G |  | 2.35 | 9.78 | . |
| Alanine | Ala | A |  | 2.35 | 9.87 | . |
| Valine | Val | V |  | 2.29 | 9.74 | . |
| Leucine | Leu | L |  | 2.33 | 9.74 | . |
| Isoleucine | Ile | I |  | 2.32 | 9.76 | . |
| Methionine | Met | M |  | 2.13 | 9.28 | . |
| Proline | Pro | P |  | 1.95 | 10.64 | . |
| Phenylalanine | Phe | F |  | 2.20 | 9.31 | . |
| Tryptophan | Trp | W |  | 2.46 | 9.41 | . |
| Uncharged Polar Side Chains | ||||||
| Serine | Ser | S |  | 2.19 | 9.21 | . |
| Threonine | Thr | T |  | 2.09 | 9.10 | . |
| Asparagine | Asn | N |  | 2.14 | 8.72 | . |
| Glutamine | Gln | Q |  | 2.17 | 9.13 | . |
| Tyrosine | Tyr | Y |  | 2.20 | 9.21 | 10.46 |
| Cysteine | Cys | C |  | 1.92 | 10.70 | 8.37 |
| Charged Polar Side Chains10.54 | ||||||
| Lysine | Lys | K |  | 2.16 | 9.06 | 10.54 |
| Arginine | Arg | R |  | 1.82 | 8.99 | 12.48 |
| Histidine | His | H |  | 1.80 | 9.33 | 6.04 |
| Aspartic Acid | Asp | D |  | 1.99 | 9.90 | 3.90 |
| Glutamic Acid | Glu | E |  | 2.10 | 9.47 | 4.07 |