Chapter 3 - 20 Amino Acids

How many Hydrophobic amino acids are there?

9

What makes the Hydrophobic amino acids unique?

• R chains are mostly C–C and C–H bonds

  • No H-bonding

List the 9 Hydrophobic amino acids

Glycine

Alanine

Valine

Leucine

Isoleucine

Methlonine

Proline

Phenylalanine

Tryptophan

What mnemonic can be used to remember the 9 hydrophobic amino acids?

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Which amino acid is this?

Glycine

Which amino acid is this?

Alanine

Which amino acid is this?

Valine

Which amino acid is this?

Leucine

Which amino acid is this?

Isoleucine

Which amino acid is this?

Methionine

• Contains sulfur

Which amino acid is this?

Proline

• Only amino acid to bond to the amino group bonded to the alpha carbon

Which amino acid is this?

Phenylalanine

• One ring in R chain

Which amino acid is this?

Tryptophan

• Two rings in R chain

Which amino acid does “Gly” refer to?

Glycine

Which amino acid does “Ala” refer to?

Alanine

Which amino acid does “Val” refer to?

Valine

Which amino acid does “Leu” refer to?

Leucine

Which amino acid does “Ile” refer to?

Isoleucine

Which amino acid does “Met” refer to?

Methionine

Which amino acid does “Pro” refer to?

Proline

Which amino acid does “Phe” refer to?

Phenylalanine

Which amino acid does “Trp” refer to?

Tryptophan

How many Polar amino acids are there?

8

What makes the Polar amino acids unique?

• Will have side chains with N, O, or S “sticking out”

• Hydrophilic properties

List the 8 Polar amino acids

Tyrosine

Cysteine

Histidine

Glycine

Serine

Threonine

Asparagine

Glutamine

What mnemonic can be used to remember the 8 polar amino acids?

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Which amino acid is this?

Tyrosine

• Ring with OH

Which amino acid is this?

Cysteine

• Contains sulfur

• Capable of making a crosslink with its side chain

Which amino acid is this?

Histidine

• Ring with N

Which amino acid is this?

Glycine

Which amino acid is this?

Serine

Which amino acid is this?

Threonine

Which amino acid is this?

Asparagine

Which amino acid is this?

Glutamine

Which amino acid does “Tyr” refer to?

Tyrosine

Which amino acid does “Cys” refer to?

Cysteine

Which amino acid does “His” refer to?

Histidine

Which amino acid does “Gly” refer to?

Glycine

Which amino acid does “Ser” refer to?

Serine

Which amino acid does “Thr” refer to?

Threonine

Which amino acid does “Asn” refer to?

Asparagine

Which amino acid does “Gln” refer to?

Glutamine

How many charged amino acids are there?

4

What makes the charged amino acids unique?

• Always charged under physiological pH

• Can form hydrogen bonds

List the 4 charged amino acids

Aspartate

Glutamate

Lysine

Arginine

What mnemonic can be used to remember the 4 charged amino acids?

A God Likes Arginine

Negatively charged amino acids have (acidic/basic) side chains

Acidic

Positively charged amino acids have (hydrophobic/hydrophilic) side chains

Hydrophilic

Which amino acid is this?

Aspartate

Which amino acid is this?

Glutamate

Which amino acid is this?

Lysine

Which amino acid is this?

Arginine

Which amino acid does “Asp” refer to?

Asparate

Which amino acid does “Glu” refer to?

Glutamate

Which amino acid does “Lys” refer to?

Lysine

Which amino acid does “Arg” refer to?

Arginine