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Biochem(amino acid) > Polar amino acid > Flashcards

Polar amino acid Flashcards

1
Q

The abbreviation of serine?

A

Ser/S

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2
Q

The R group of S contain?

A

The R group of Serine contain polar hydroxyl group

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3
Q

Can serine be ionizable?

A

No,it can’t lose (H+)(not titrable)

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4
Q

The abbreviation of Threonine?

A

Thr/T

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5
Q

The R group of Thr contain?

A

Polar Hydroxyl group

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6
Q

In S and T in which carbon of R group the hydroxyl group attach?

A

In serin and Threonine the (oH)attach on B_carbon

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7
Q

How many assymetric carbon in T?

A

2 assymetric carbon(الفا وبيتا)

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8
Q

What is the polar uncharged amino acid that has two chiral (assymetric)carbon?

A

Threonine

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9
Q

The only two amino acids that contain two assymetric carbon(الفا وبيتا)?

A

Isoleucine(Ile/I),Threonine(Thr/T)

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10
Q

The abbreviation of Tyrosine?***

A

Tyr/y

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11
Q

The polar amino acid that derived from phe(phenylalanine)?

A

Tyr/y🙃(Tyrosine).

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12
Q

The R group in Y contain?

A

Phenol group (the name of amino acid:Tyrosine).

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13
Q

The polar aromatic amino acid?

A

Y/Tyr🙃

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14
Q

The amino acids that contain aromatic side chain?

A

Phenylalanine(Phe/F), Tryptophan(Trp/W),Tyrosine(Tyr/Y)

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15
Q

Is Tyr/Y titrable?

A

Yes,(at pH=7,OH protonated and Neutral)and(at PH bigger than 10.07, O- deprotonated and negative).

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16
Q

The abbreviation of Cysteine?

A

Cys/C

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17
Q

R in Cys contain?

A

Sulfohydryl(Thiol)group

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18
Q

R in Cys contain?

A

Sulfohydryl(Thiol)group

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19
Q

The polar amino acid that contain sulfer?

A

Cys/C(Cysteine)

20
Q

The amino acids that contain sulfer?

A

Methionine(Met/M), Cysteine(Cys/C)

21
Q

Is sulfer reactive in Cys?

A

Yes, cause it’s terminal (but remember sulfer in Met not reactive cause it’s within the skeleton)🤝

22
Q

Is cycteine titrable?

A

Yes,(at PH=7, SH protonated and Neutral)and(at PH higher than 8.18, S- deprotonated and negative.

23
Q

The abbreviation of Asparagine?***

A

Asn/N

24
Q

Side chain in (Asn/N)?

A

In Asparagine the R group contain (polar amide group at B_carbon)(CONH2)

25
Q

Is N titrable?

A

No, Asn(Asparagine) not titrable

26
Q

The abbreviation of Glutamine?***

A

Gln/Q

27
Q

R group in (Gln/Q)?

A

Contain polar amide(CONH2)

28
Q

Q titrable?

A

No,Glutamine not titrable

29
Q

Which side chain is longest in Asn or Gln?

A

In Glutamine side chain is longer(and remember in Asparagine amide attach on( B_carbon ),but in (Q) it attach on( y_carbon)

30
Q

When two Cystein undergo oxidation will form?and what’s the name of bond?

A

Cystine, covalent bond (disulfide bond)(this bond stabilize the structure of the protein)(and remember Cystine not amino acid).

31
Q

What are the acidic amino acids?

A

Aspartic acid and Glutamic acid(they have acidic R group which is negatively charged at PH=7)

32
Q

The abbreviation od Aspartic acid?***

A

Asp/D

33
Q

The abbreviation of Glutamic acid is?***

A

Glu/E

34
Q

Asp and Glu have side chain contain?

A

Polar carboxyl group(but in Aspartic acid (COOH) attach at B_carbon)and in Glutamic acid attach at(y_carbon), so R group in( E) is longer than( D).

35
Q

Aspartate is?

A

Deprotonated form of Aspartic acid and is precursor for Asparagine.🥲

36
Q

Glutamate is?

A

Deprotonated form of Glutamic acid and precursor for Glutamine.🥲

37
Q

The basic amino acids are?

A

Lysine/Histidine/Arginine

38
Q

The abbreviation of Lysine?***

A

Lys/k

39
Q

R group in Lysine(Lys/k) contain?

A

Amine(NH3+)(the name of side chain:Butyl_ammonium)

40
Q

The abbreviation of Histidine?

A

His/H

41
Q

The R group in (His) contain?

A

Imidazol ring

42
Q

The basic amino group that has pka=6 close to physiologic PH and work as abuffer inside the body?

A

Histidine(basic structure with asidic pka).

43
Q

What is the factor that makes protein work as abuffer?

A

If it has big amount of histidine(high content) (just like hemoglobin).

44
Q

What is the abbreviation of Arginine?***

A

Arg/R

45
Q

R group in Arg contain?

A

Guanidino group

46
Q

The charge of basic amino acid at PH=7 will be?

A

Positive charge🙃

47
Q

Are acidic and basic amino acid ionizable?

A

Yes

Biochem(amino acid) (3 decks)

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