Name of Amino Acid R-group Properties Type of functional group Polarity pKa (whe

Question

Name of Amino Acid

R-group Properties

Type of functional group

Polarity

pKa    (when applicable)

Charge at pH=7 (when app)

Special Properties

(some examples)

Alanine

Arginine

Asparagine

Aspartate

Carboxyl

Polar

3.9

negative

Cysteine

Sulfhydryl

Polar

N/A

N/A

Forms S-S

Glutamine

Glutamate

Glycine

Histidine

Isoleucine

Leucine

Lysine

Methionine

Phenylalanine

Aromatic (phenol)

Non-Polar

N/A

N/A

Absorbs @ 280 nm

Proline

Serine

Can be phophorylated

Threonine

Tryptophane

Tyrosine

Valine

Name of Amino Acid

R-group Properties

Type of functional group

Polarity

pKa    (when applicable)

Charge at pH=7 (when app)

Special Properties

(some examples)

Alanine

Arginine

Asparagine

Aspartate

Carboxyl

Polar

3.9

negative

Cysteine

Sulfhydryl

Polar

N/A

N/A

Forms S-S

Glutamine

Glutamate

Glycine

Histidine

Isoleucine

Leucine

Lysine

Methionine

Phenylalanine

Aromatic (phenol)

Non-Polar

N/A

N/A

Absorbs @ 280 nm

Proline

Serine

Can be phophorylated

Threonine

Tryptophane

Tyrosine

Valine

Explanation / Answer

hi

Alanine  is an ?-amino acid with the chemical formula CH3CH(NH2)COOH.

Arginine  is an ?-amino acid. It was first isolated in 1886. The L-form is one of the 20 most common natural amino acids. At the level of molecular genetics, in the structure of the messenger ribonucleic acid mRNA, CGU, CGC, CGA, CGG, AGA, and AGG, are the triplets of nucleotide bases or codons that code for arginine during protein synthesis.

Asparagine  is one of the 20 most common natural amino acids on Earth. It hascarboxamide as the side-chain's functional group. It is not an essential amino acid. Its codons are AAU and AAC

Name of Amino Acid

R-group Properties

Type of functional group

Polarity

pKa    (when applicable)

Charge at pH=7 (when app)

Special Properties

(some examples)

Alanine

carboxyl

Arginine

Asparagine

Aspartate

Carboxyl

Polar

3.9

negative

Cysteine

Sulfhydryl

Polar

8.33

N/A

Forms S-S

Glutamine

Glutamate

Glycine

Histidine

positive(10%)

neutral(90%)

Isoleucine

Leucine

Lysine

Methionine

Phenylalanine

Aromatic (phenol)

Non-Polar

N/A

N/A

Absorbs @ 280 nm

Proline

Serine

Can be phophorylated

Threonine

Tryptophane

Tyrosine

Valine

NA                     neutral

Name of Amino Acid

R-group Properties

Type of functional group

Polarity

pKa    (when applicable)

Charge at pH=7 (when app)

Special Properties

(some examples)

Alanine

carboxyl

Non-polar NA neutral

Arginine

amine Basic polar 12.48 positive

Asparagine

carboxamide polar NA neutral essential amino acid

Aspartate

Carboxyl

Polar

3.9

negative

Cysteine

Sulfhydryl

Polar

8.33

N/A

Forms S-S

Glutamine

amine polar NA neutral

Glutamate

carboxylic acidic polar 4.25 negative

Glycine

hydrogen non polar NA neutral

Histidine

imidazole basic polar 6.0

positive(10%)

neutral(90%)

Isoleucine

non polar NA neutral

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