Biochemistry

Amino Acids

Explore 3D structures of 20 standard amino acids; polarity, pKa and classification.

All

Nonpolar (Hydrophobic)

Polar (Uncharged)

Positively Charged

Negatively Charged

Special Structure

Glycine

Glisin

G

Gly

Special Structure

MW: 75.03 · pKa₁: 2.34 · pKa₂: 9.6

Alanine

Alanin

A

Ala

Nonpolar (Hydrophobic)

MW: 89.09 · pKa₁: 2.34 · pKa₂: 9.69

Valine

Valin

V

Val

Nonpolar (Hydrophobic)

MW: 117.15 · pKa₁: 2.32 · pKa₂: 9.62

Leucine

Lösin

L

Leu

Nonpolar (Hydrophobic)

MW: 131.17 · pKa₁: 2.36 · pKa₂: 9.6

Isoleucine

İzolösin

I

Ile

Nonpolar (Hydrophobic)

MW: 131.17 · pKa₁: 2.36 · pKa₂: 9.68

Proline

Prolin

P

Pro

Special Structure

MW: 115.13 · pKa₁: 1.99 · pKa₂: 10.96

Phenylalanine

Fenilalanin

F

Phe

Nonpolar (Hydrophobic)

MW: 165.19 · pKa₁: 1.83 · pKa₂: 9.13

Tryptophan

Triptofan

W

Trp

Nonpolar (Hydrophobic)

MW: 204.23 · pKa₁: 2.83 · pKa₂: 9.39

Methionine

Metiyonin

M

Met

Nonpolar (Hydrophobic)

MW: 149.21 · pKa₁: 2.28 · pKa₂: 9.21

Serine

Serin

S

Ser

Polar (Uncharged)

MW: 105.09 · pKa₁: 2.21 · pKa₂: 9.15

Threonine

Treonin

T

Thr

Polar (Uncharged)

MW: 119.12 · pKa₁: 2.09 · pKa₂: 9.1

Asparagine

Asparagin

N

Asn

Polar (Uncharged)

MW: 132.12 · pKa₁: 2.02 · pKa₂: 8.8

Glutamine

Glutamin

Q

Gln

Polar (Uncharged)

MW: 146.15 · pKa₁: 2.17 · pKa₂: 9.13

Tyrosine

Tirozin

Y

Tyr

Polar (Uncharged)

MW: 181.19 · pKa₁: 2.2 · pKa₂: 9.11 · pKaR: 10.07

Cysteine

Sistein

C

Cys

Special Structure

MW: 121.16 · pKa₁: 1.96 · pKa₂: 10.28 · pKaR: 8.18

Lysine

Lizin

K

Lys

Positively Charged

MW: 146.19 · pKa₁: 2.18 · pKa₂: 8.95 · pKaR: 10.53

Arginine

Arjinin

R

Arg

Positively Charged

MW: 174.2 · pKa₁: 2.17 · pKa₂: 9.04 · pKaR: 12.48

Histidine

Histidin

H

His

Positively Charged

MW: 155.16 · pKa₁: 1.82 · pKa₂: 9.17 · pKaR: 6

Aspartic Acid

Aspartik Asit

D

Asp

Negatively Charged

MW: 133.1 · pKa₁: 1.88 · pKa₂: 9.6 · pKaR: 3.65

Glutamic Acid

Glutamik Asit

E

Glu

Negatively Charged

MW: 147.13 · pKa₁: 2.19 · pKa₂: 9.67 · pKaR: 4.25

Glycine(Gly / G)

Glisin

The smallest amino acid; side chain is a single hydrogen atom. Achiral. Plays a key role in collagen structure.

Molar Mass

75.03 g/mol

Side Chain

Special Structure

pKa₁ (α-COOH)

2.34

pKa₂ (α-NH₃⁺)

9.6

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Amino Acids

Glycine

G

Alanine

A

Valine

V

Leucine

L

Isoleucine

I

Proline

P

Phenylalanine

F

Tryptophan

W

Methionine

M

Serine

S

Threonine

T

Asparagine

N

Glutamine

Q

Tyrosine

Y

Cysteine

C

Lysine

K

Arginine

R

Histidine

H

Aspartic Acid

D

Glutamic Acid

E

Glycine.css-1674nqt{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,'Helvetica Neue',Arial,sans-serif;font-weight:400;font-size:0.875rem;line-height:1.43;color:#8B5CF6;margin-left:8px;font-weight:700;}(Gly / G)

Glycine(Gly / G)