All 20 Amino Acids Flashcards
Name the Amino Acid shown below:

Alanine (Ah-la-neen)
Features
- Single letter code = A
- Three letter code = Ala
- Codons = GCU, GCC, GCA, GCG
- Has a non-polar hydrophobic side chain.

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Arginine (Are-ji-neen)
Features
- Single letter code = R
- Three letter code = Arg
- Codons = CGU, CGC, CGA, CGG, AGA, AGG
- Has a positively charged hydrophilic side chain.

Name the Amino Acid shown below:

Asparagine (a-spar-ra-gene)
Features
- Single letter code = N
- Three letter code = Asn
- Codons = AAU, AAC
- Has an uncharged polar (hydrophilic) side chain.

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Aspartic acid (Ah-spar-tick acid)
Features
- Single letter code = D
- Three letter code = Asp
- Codons = GAU, GAC
- Has a negatively charged hydrophilic side chain.

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Cysteine
Features
- Single letter code = C
- Three letter code = Cys
- Codons = UGU, UGC
- It is a special case amino acid

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Glutamic Acid
Features
- Single letter code = E
- Three letter code = Glu
- Codons = GAG, GAA
- Has a negatively charged hydrophilic side chain.

Name the Amino Acid shown below:

Glutamine
Features
- Single letter code = Q
- Three letter code = Gln
- Codons = CAA, CAG
- It has a polar but uncharged side chain.

Name the Amino Acid shown below:

Glycine
Features
- Single letter code = G
- Three letter code = Gly
- Codons = GGU, GGC, GGA, GGG
- It is the simplest amino acid of the 20 amino acids since its side chain only contains a single H atom.
- Since it’s side chain only contains a single H atom, it is the only amino acid with a central carbon that is not a chiral carbon.
- It is a special case amino acid.

Name the Amino Acid shown below:

Histidine
Features
- Single letter code = H
- Three letter code = His
- Codons = CAC, CAU
- Has a positively charged hydrophilic side chain

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Isoleucine
Features
- Single letter code = I
- Three letter code = Ile
- Codons = AUA, AUC, AUU
- Has a non-polar hydrophobic side chain.

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Leucine
Features
- Single letter code = L
- Three letter code = Leu
- Codons = CUU, CUC, CUA, CUG
- Has a non-polar hydrophobic side chain.

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Lysine
Features
- Single letter code = K
- Three letter code = Lys
- Codons = AAA, AAG
- Has a positively charged hydrophilic side chain.

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Methionine
Features
- Single letter code = M
- Three letter code = Met
- Codons = AUG
- Has a non-polar hydrophobic side chain.

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Phenylalanine
Features
- Single letter code = F
- Three letter code = Phe
- Codons = UUU, UUC
- Has a non-polar hydrophobic side chain.

Name the Amino Acid shown below:

Proline
Features
- Single letter code = P
- Three letter code = Pro
- Codons = CCU, CCC, CCA, CCG
- It is a special case amino acid.
- Ignore the negative charge next to the H2 N group because that negative charge belongs to the COOH group of glycine.

Name the Amino Acid shown below:

Serine
Features
- Single letter code = S
- Three letter code = Ser
- Codons = AGU, AGC
- Has an uncharged polar (hydrophilic) side chain.

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Threonine
Features
- Single letter code = T
- Three letter code = Thr
- Codons = ACU, ACC, ACA, ACG
- Has an uncharged polar (hydrophilic) side chain.

Name the Amino Acid shown below:

Tryptophan
Features
- Single letter code = W
- Three letter code = Trp
- Codons = UGG
- Has a non-polar hydrophobic side chain.

Name the Amino Acid shown below:

Tyrosine
Features
- Single letter code = Y
- Three letter code = Tyr
- Codons = UAC, UAU
- Has an uncharged polar (hydrophilic) side chain.

Name the Amino Acid shown below:

Valine
Features
- Single letter code = V
- Three letter code = Val
- Codons = GUU, GUC, GUA, GUG
- Has a non-polar hydrophobic side chain.

Codon Chart


All 20 amino acids

