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Flashcards in amino acids quiz Deck (66):
1

essential amino acids

L,I,V,H,K,M, F,T,W

2

neutral amino acids

S,T,C,Y,N,Q

3

thiol containing AA

cysteine

4

sulfide containing AA

methionine

5

contains phenolic group

tyrosine

6

can be found at the surface of the cell
hydrophilic and polar

tyrosine

7

contains an amido group at the beta carbon

asparagine

8

contains an amido group at the gamma carbon

glutamiine

9

neutral nonpolar

G,A,L,V,I,M,P,F,W

10

simplest AA because it contains 2 H

glycine

11

the only optically inactive AA

glycine

12

AA containing a methyl group

alanine

13

AA containing an isopropyl group

valine

14

AA containing isobutyl group

leucine

15

AA containing sec-butylgroup

isoleucine

16

beta-branched AA

V, L, I

17

contains an imino acid
cyclic but not aromatic

proline

18

has a phenyl ring

phenylalanine

19

contains an indole ring

tryptophan

20

acidic amino acids

D, E

21

Basic amino acids

H, K, R

22

has a primary amine
epsilon amino group

lysine

23

has a guanidinium ion

arginine

24

out of the 19 AA, what is the config of th 18 AA

S-configuration (counterclockwise)

25

AA with R config

cysteine

26

most hydrophobic AA

isoleucine

27

least hydrophobic

proline

28

if pH > pKa, ionizable group will be

DEprotonated

29

if pH < pKa, ionizable group will be

protonated

30

if pH = pKa, ionizable group will be

mixture of protonated and deprotonated forms
zwitterion

31

in _______pH, peptides will be isolated

isoelectric

32

*A stereocenter occurs in all amino acids except for

glycine.

33

*The amino acids that occur in proteins are all of the --- form.

L

34

THE only AA which contains a secondary amine

proline

35

occur in some but not all proteins
-derived from the common amino acids

Uncommon Amino Acids

36

a free AA exist as ________

zwitterion

37

– has equal positive and negative charges
-electrically neutral in solution

*Zwitterion

38

the guanido group of arginine is connected to ___ carbon

delta

39

how many confi of AA exist in our biological system

1

40

a cpd that can act as acid and a base is called

amphoteric

41

a cpd that has both + and - charges is called

dipolar

42

AA are optically

active

42

Aromatic AA

Phenylalanine
Tyrosine
Tryptophan

43

Sulfur containing AA

Methionine
Cysteine

44

Alcohol AA

Serine threonine

45

Side chain of alanine

Methyl

46

Side chain of valine

Isopropyl

47

Side chain of isoleucine

Sec-butyl

48

Side chain of tryptophan

Indole ring

49

Side chain of methionine

Sulfide

50

Side chain of histidine

IMIDAZOLE

51

Side chain of leucine

Isobutyl

52

Side chain of asparagine

Amido group

53

AA uncharged but highly polar

Asparagine
Glutamine

54

Side chain of phenylalanine

Phenyl

55

Side chain of threonine

Alcohol

56

Side chain of serine

Alcohol

57

Side chain of lysine

Alkylamino

58

AA with amino group at epsilon carbon

Lysine

59

Side chain of arginine

Guanido group/guanidinium ion

60

Side chain of aspartate

Carboxylic acids/carboxylate anion

61

Side chain of glutamine

Amido group at the gamma carbon

62

Side chain of proline

Pyrrolidine

63

Side chain of glutamate

Carboxylicbacid/carboxylate at gamma carbon

64

Side chain of cysteine

Thiol

65

AA with 2 stereocenters

Isoleucine and threonine

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