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Flashcards in Ch. 2 Review Deck (13)
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1

pKa

NH3+ = 9
OH- = 2
SH = 8

2

Gain e-

Reduction

3

Lose e-

Oxidation

4

Phi

C-N bond

5

Psi

C-C bond

6

Ramachandran plot

Show values of psi and phi + locations and angles

7

Secondary structure of a protein

Alpha helix

8

Characteristics of alpha helix

-5.4 A•
-Hydrogen bonds
-Every 4th AA residue forms H+ bonds

9

Characteristics of Beta-sheet

-anti + parallel strands

Anti: strands run in opposite directions, bonding is shorter and more stable

Parallel: adjacent strands run in same direction

7A•

10

Characteristics of turns and loops

Bond/turn= same

Turns: smaller length, beta is most common

Loops: no H+ between length, no particular character, relatively long, random coil

11

What is a tertiary structure

3D structure

12

Fibrous proteins of:

1) alpha-keratin
2) collagen

1) every 7 AA Is a leucine. There is also a cysteine reach

2) every 3 AA there is a glycine. There is also a proline reach + stiff turn and hydroxyl proline

13

What are globular proteins? Give example.

-Water-soluble proteins
-non-polar cores (hydrophilic outside + hydrophobic inside)

Ex.) myoglobin