Amino Acids

Card Set Information

Author:
kohaa
ID:
198294
Filename:
Amino Acids
Updated:
2013-02-05 23:36:14
Tags:
CHE 130A
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Description:
All 20 amino acids and 4 grouping questions
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  1. Alanine
    A

    -CH3 (Nonpolar/hydrophobic)

    No pKa on R group
  2. Arginine
    R

    -CH2-CH2-CH2-NH-C(NH2)=NH (+ polar)

    pKa = 12.48
  3. Asparagine
    N

    -CH2-C(NH2)=O (neutral amide bond)

    No pKa on R group
  4. Aspartic Acid
    D

    -CH2-COOH (- polar)

    pKa = 3.65
  5. Cysteine
    C

    -CH2-SH

    pKa = 8.18

    Abundant in hair and keratin of skin.
  6. Glutamic Acid
    E

    -CH2-CH2-COOH

    pKa = 4.25

    Used as a condiment called MSG (monosodium glutamate).
  7. Glutamine
    Q

    -CH2-CH2-C(NH2)=O

    No pKa on R group
  8. Glycine
    G

    -H

    No pKa on R group
  9. Histidine
    H

    -CH2-imidazole ring (+ polar)

    pKa = 6

    Direct precursor of histamine.
  10. Isoleucine
    I

    -CH2(CH3)-CH2-CH3

    No pKa on R group
  11. Leucine
    L

    -CH2-CH(CH3)2

    No pKa on R group
  12. Lysine
    K

    -CH2-CH2-CH2-CH2-NH2

    pKa = 10.53
  13. Methionine
    M

    -CH2-CH2-S-CH3

    No pKa on R group
  14. Phenylalanine
    F

    -CH2-phenyl group

    No pKa on R group
  15. Proline
    P

    -CH2-CH2-CH2-(Amine group on backbone)

    No pKa on R group

    Adds sharp bends/kinks to peptide chain.
  16. Serine
    S

    -CH2-OH

    No pKa on R group
  17. Threonine
    T

    -CH(OH)-CH3

    No pKa on R group
  18. Tryptophan
    W

    -CH3-([3]Indole group)

    No pKa on R group

    Makes poop smelly since bacteria break it down to compounds such as skatole and Indole.
  19. Tyrosine
    Y

    -CH2-phenyl-OH

    pKa = 10.07
  20. Valine
    V

    -CH(CH3)2

    No pKa on R group
  21. Hydrophobic Amino Acids
    V, L, I, F, M, P, G, W, A
  22. + charged amino acids
    K, H, R
  23. - charged amino acids
    D, E
  24. Charged nonpolar amino acids
    S, T, Q, C, R, Y

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