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40 notecards = 10 pages (4 cards per page)

Viewing:

Ch. 4 amino acids

front 1

Dand E are basic amino acids because at neutral pH they

back 1

donated a side-chain proton

front 2

K and R are considered basic because at neutral pH they have

back 2

accepted a side-chain proton

front 3

All amino acids are

back 3

polyprotic, weak acids

front 4

A peptide bond is formed in a condensation reaction between two

back 4

two amino acids

front 5

Which amino acids are the exceptions when it comes to Geometry and chirality?

back 5

Proline and Glycine

front 6

Which amino acids falls under nonpolar?

back 6

Leucine, Proline, Alanine, Methionine, Tryptophan, Phenylalanine, isoleucine and Valine

front 7

Which amino acids are considered polar?

back 7

Glycine, Serine, Asparagine, Glutamine, Threonine, Cysteine, and Tyrosine

front 8

which amino acids are considered acidic?

back 8

Aspartic acid and Glutamic acid

front 9

Which amino acids are considered basic?

back 9

Lysine, Arginine, and Histidine

front 10

At a neutral pH, the alpha amino group and alpha carboxyl group are

back 10

charged

front 11

If the pH is below the pKa

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protonate

front 12

If pH is above the pKa

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deprotonate

front 13

DEHCYKR:

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D=3.9, E=4.1, H=6.0, C=8.4, Y=10.5, K=10.5, R= 12.5

front 14

All amino acids are chiral except:

back 14

glycine

front 15

Which amino acid configuration predominates?

back 15

L-amino aicds

front 16

Absorbance is at___ especially in Tyr and Trp.

back 16

280 nm

front 17

When a protein in floating freely in an aqueous solution, the

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hydrophobic side will be inside the proteins and hydrophilic will be found on the outside of protein

front 18

When pH<pKa, it is

back 18

(+) charged

front 19

When pH>pKa, it is

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(-) charged

front 20

Cysteine is the only amino acid that participates in

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covalent reaction in proteins

front 21

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leucine, Leu, L

front 22

back 22

Proline, Pro, P

front 23

back 23

Alanine, Ala, A

front 24

back 24

Valine, Val, V

front 25

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Methionine, Met, M

front 26

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Tryptophan, Try, W

front 27

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Phenylalanine, Phe, F

front 28

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Isoleucine, Ile, I

front 29

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Glycine, Gly, G

front 30

back 30

Asparagine, Asn, N

front 31

back 31

Serine, Ser, S

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back 32

Glutamine, Gln, Q

front 33

back 33

Threonine, Thr, T

front 34

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Tyrosine, Tyr, Y

front 35

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Cysteine, Cys, C

front 36

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Aspartic acid, Asp, D

front 37

back 37

Glutamic acid, Glu, E

front 38

back 38

Lysine, Lys, K

front 39

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Arginine, Arg, R

front 40

back 40

Histidine, His, H