Biochemistry Exam 1: Amino acids

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

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Hydrophobic Solvents

Chloroform, Diethyl ether, Benzene, Carbon tetrachloride, and Hexane

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Clathrates

Cage around non-polar molecules

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when is entropy greater

When dissolved in water

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Micelles

A sphere structure, its a detergent

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What powers our bodies

Crabs, Fats, and Proteins

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All side chains are __

Hydrophobic

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Glycine

Gly

G

<p>Gly </p><p>G </p>
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Alanine

Ala

A

<p>Ala</p><p>A</p>
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Valine

Val

V

<p>Val </p><p>V </p>
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Leucine

Leu

L

<p>Leu </p><p>L</p>
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Isoleucine

ile

i

<p>ile</p><p>i</p>
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Proline

Pro

P

<p>Pro </p><p>P</p>
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Methionine

Met

M

<p>Met </p><p>M</p>
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Non-polar, Aliphatic Amino Acids are

G, A, V, L, I, P, and M

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Aromatic Amino Acids (very stable and hydrophobic) are

F, Y, and W

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Phenylalanine

Phe

F

<p>Phe </p><p>F </p>
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Tyrosine

Tyr

Y

<p>Tyr</p><p>Y</p>
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Tryptophan

Trp

W

<p>Trp </p><p>W</p>
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What amino acid is indole?

Tryptophan

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Tyrosine pKa (acid or base form)

10.10 (acid) OH

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Lysine

Lys

K

<p>Lys </p><p>K</p>
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Arginine

Arg

R

<p>Arg </p><p>R</p>
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Histidine

His

H

<p>His </p><p>H</p>
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Lysine pKa (acid or base)

10.5 (acid) NH3+

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Arginine pKa (acid or base)

12.5 (acid) NH2+

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Histidine pKa (acid or base)

6.0 (acid) NH+

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Basic Amino Acids are

K, R, and H

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Acidic Amino Acids are

D and E

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Aspartate

Asp

D

<p>Asp </p><p>D </p>
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Glutamate

Glu

E

<p>Glu </p><p>E</p>
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Aspartate pKa (acid or base)

3.9 (acid) OH

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Glutamate pKa (acid or base)

4.1 (acid) OH

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Asparagine

Asn

N

<p>Asn </p><p>N </p>
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Glutamine

Gln

Q

<p>Gln</p><p>Q</p>
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Serine

Ser

S

<p>Ser </p><p>S</p>
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Threonine

Thr

T

<p>Thr</p><p>T</p>
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Cysteine

Cys

C

<p>Cys</p><p>C</p>
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Cysteine pKa (acid or base)

8.3 (acid) SH

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What is the charge for an isoelectric point

0 net charge

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Isoelectric point (pI) equation

pI= ½ (pK1 + pK2)

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All a-amino acids found in proteins have what sterochemistry?

L

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How many amino acids are there?

20