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Standard Amino Acids Cheat Sheet, Cheat Sheet of Biochemistry

Reference study guide listing most common 20 amino acids, all of these are present in DNA

Typology: Cheat Sheet

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Alanine
Proline
Cysteine
Aspartic Acid
Alkyl Aromatic Neutral Acidic Basic Essential Non-Essential
Glycine
Valine
Glutamine
Glutamic Acid
Isoleucine
Phenylalanine
Serine
Arginine
Leucine
Tryptophan
Threonine
Histidine
Methionine
Asparagine
Tyrosine
Lysine
Ala A
NH2: 9.87 COOH: 2.35
Note: The NH2 and COOH values listed below are pKa values.
Pro P
NH2: 10.60 COOH: 1.99
Cys C
NH2: 10.78 COOH: 1.71
Asp D
NH2: 9.60 COOH: 1.88
Gly G
NH2: 9.60 COOH: 2.34
Val V
NH2: 9.72 COOH: 2.29
Gln Q
NH2: 9.13 COOH: 2.17
Glu E
NH2: 9.67 COOH: 2.19
Ile I
NH2: 9.76 COOH: 2.32
Phe F
NH2: 9.24 COOH: 2.58
Ser S
NH2: 9.15 COOH: 2.21
Arg R
NH2: 9.09 COOH: 2.18
Leu L
NH2: 9.60 COOH: 2.36
Trp W
NH2: 9.39 COOH: 2.38
Thr T
NH2: 9.12 COOH: 2.15
His H
NH2: 8.97 COOH: 1.78
Met M
NH2: 9.21 COOH: 2.28
Asn N
NH2: 8.80 COOH: 2.02
Tyr Y
NH2: 9.11 COOH: 2.20
Lys K
NH2: 10.28 COOH: 8.90
Amino Acids Reference Guide
Amino acids are the building blocks of proteins. Approximately 500 of them exist, but only 20 appear
in our genetic code. Those shown below are known as standard amino acids.
Use the following as a reference guide for amino acid names, abbreviations, and structures.
Chart Key
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Alanine

Proline

Cysteine

Aspartic Acid

Alkyl Aromatic Neutral Acidic Basic Essential Non-Essential

Glycine

Valine

Glutamine

Glutamic Acid

Isoleucine

Phenylalanine

Serine

Arginine

Leucine

Tryptophan

Threonine

Histidine

Methionine

Asparagine

Tyrosine

Lysine

Ala A

NH 2 : 9.87 COOH: 2.

Note: The NH 2 and COOH values listed below are pKa values.

Pro P

NH 2 : 10.60 COOH: 1.

Cys C

NH 2 : 10.78 COOH: 1.

Asp D

NH 2 : 9.60 COOH: 1.

Gly G

NH 2 : 9.60 COOH: 2.

Val V

NH 2 : 9.72 COOH: 2.

Gln Q

NH 2 : 9.13 COOH: 2.

Glu E

NH 2 : 9.67 COOH: 2.

Ile I

NH 2 : 9.76 COOH: 2.

Phe F

NH 2 : 9.24 COOH: 2.

Ser S

NH 2 : 9.15 COOH: 2.

Arg R

NH 2 : 9.09 COOH: 2.

Leu L

NH 2 : 9.60 COOH: 2.

Trp W

NH 2 : 9.39 COOH: 2.

Thr T

NH 2 : 9.12 COOH: 2.

His H

NH 2 : 8.97 COOH: 1.

Met M

NH 2 : 9.21 COOH: 2.

Asn N

NH 2 : 8.80 COOH: 2.

Tyr Y

NH 2 : 9.11 COOH: 2.

Lys K

NH 2 : 10.28 COOH: 8.

Amino Acids Reference Guide

Amino acids are the building blocks of proteins. Approximately 500 of them exist, but only 20 appear

in our genetic code. Those shown below are known as standard amino acids.

Use the following as a reference guide for amino acid names, abbreviations, and structures.

Chart Key