amino acids

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biochem exam #1

Last updated 5:39 PM on 9/9/26
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20 Terms

1
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Alanine

Ala, A, Nonpolar Aliphatic R Group

<p>Ala, A, Nonpolar Aliphatic R Group</p>
2
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Glycine

Gly, G, Nonpolar Aliphatic R Group

<p>Gly, G, Nonpolar Aliphatic R Group</p>
3
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Isoleucine

Ile, I, Nonpolar Aliphatic R Group

<p>Ile, I, Nonpolar Aliphatic R Group</p>
4
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Leucine

Leu, L, Nonpolar Aliphatic R Group

<p>Leu, L, Nonpolar Aliphatic R Group</p>
5
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Proline

Pro, P, Nonpolar Aliphatic R Group

<p>Pro, P, Nonpolar Aliphatic R Group</p>
6
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Valine

Val, V, Nonpolar Aliphatic R Group

<p>Val, V, Nonpolar Aliphatic R Group</p>
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Phenylalanine

Phe, F, Aromatic R Group, non polar

<p>Phe, F, Aromatic R Group, non polar</p>
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Tryptophan

Trp, W, Aromatic R Group, non polar (but the N-H can form weak H bonds sometimes, because indole structure outweighs small poolarity)

<p>Trp, W, Aromatic R Group, non polar (but the N-H can form weak H bonds sometimes, because indole structure outweighs small poolarity)</p>
9
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Tyrosine

Tyr, Y, pKa=10, Aromatic R group, polar (bc of OH) BUT uncharged

<p>Tyr, Y, pKa=10, Aromatic R group, polar (bc of OH) BUT uncharged</p>
10
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Aspartic acid (at low pH)/ Aspartate (at pH=7.4)

Asp, D, pKa= 3.7, Aspartate → deprotonated, Negatively Charged R Group, opposite for Aspartic acid (neutral at pH < 4)

<p>Asp, D, pKa= 3.7, Aspartate → deprotonated, Negatively Charged R Group, opposite for Aspartic acid (neutral at pH &lt; 4)</p>
11
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Glutamic acid (at low pH)/ Glutamate (at pH=7.4)

Glu, E, pKa= 4.3, Glutamate→ deprotonated, Negatively Charged R Group, opposite for Glutamic acid (neutral at low pH, protonated)

<p>Glu, E, pKa= 4.3, Glutamate→ deprotonated, Negatively Charged R Group, opposite for Glutamic acid (neutral at low pH, protonated)</p>
12
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Arginine

Arg, R, pKa= 12, Positively Charged R Group

<p>Arg, R, pKa= 12, Positively Charged R Group</p>
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Histidine

His, H, pKa= 6, Positively Charged R Group, SPECIAL (ionizes at pH=7.4 bc pKa=6) so half protonated species, half deprotonated (neutral) species

<p>His, H, pKa= 6, Positively Charged R Group, SPECIAL (ionizes at pH=7.4 bc pKa=6) so half protonated species, half deprotonated (neutral) species</p>
14
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Lysine

Lys, K, pKa= 10, Positively Charged R Group

<p>Lys, K, pKa= 10, Positively Charged R Group</p>
15
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Serine

Ser, S, pKa= 13, Uncharged Polar R Group

<p>Ser, S, pKa= 13, Uncharged Polar R Group</p>
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Threonine

Thr, T, pKa= 13, Uncharged Polar R Group

<p>Thr, T, pKa= 13, Uncharged Polar R Group</p>
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Cysteine

Cys, C, pKa= 8, Uncharged Polar R Group, can form disulfide bonds in oxidative environments

<p>Cys, C, pKa= 8, Uncharged Polar R Group, can form disulfide bonds in oxidative environments</p>
18
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Methionine

Met, M, Nonpolar Aliphatic R Group

<p>Met, M, Nonpolar Aliphatic R Group</p>
19
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Asparagine

Asn, N, Uncharged Polar R Group

<p>Asn, N, Uncharged Polar R Group</p>
20
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Glutamine

Gln, Q, Uncharged Polar R Group

<p>Gln, Q, Uncharged Polar R Group</p>