March 24, 2015 --> Proteins/Amino acids (191-207) Flashcards Preview

BOARD: Biochemistry (Dental Decks) > March 24, 2015 --> Proteins/Amino acids (191-207) > Flashcards

Flashcards in March 24, 2015 --> Proteins/Amino acids (191-207) Deck (26):
1

Name the essential amino acids

Histidine
Isoleucine
Leucine
Tryptophan
Threonine
Lysine
Methionine
Phenylalanine
Valine

2

Pneumonic for remembering essential amino acids

any Help in Learning T-These Little Monsters Proves Valuable

3

Amino acids are used for what 3 major purposes?

1. They are substrates for the generation of metabolic energy
2. They are substrates for protein synthesis
3. They are substrates for the synthesis of many products including heme, purines, pyrimidines etc.

4

Name the Ketogenic amino acids

Phenylalanine
Tyrosine
Isoleucine
Leucine
Tryptophan
Threonine
Lysine

5

Why are ketogenic amino acids named as such?

They are degraded entirely or in part to acetoacetyl-CoA and/or Acetyl-CoA can yield ketone bodies in the liver.

6

Which amino acids are both ketogenic and glucogenic?

Tryptophan
Phenylalanine
Tyrosine
Threonine
Isoleucine

7

Which amino acids are PURELY ketogenic

Leucine
Lysine

8

What reaction occurs to make a peptide bond?

Condensation reaction

9

Is a peptide bond a cis or trans bond? Is it charged or uncharged?

Trans bond
- Uncharged but POLAR

10

Glutamate is the precursor of what amino acids?

Glutamin
Proline
Arginine

11

Serine is the precursor of what amino acids?

Glycine and Cysteine

12

Aspartate is the precursor of what amino acids?

Asparagine
Methionine
Threonine
Lysine

13

Pyruvate gives rise to what four amino acids?

Alanine
Valine
leucine
Isoleucine

14

Oxaloacetate gives rise to what amino acid?

Aspartate

15

3-Phosphoglycerate gives rise to what amino acid?

serine

16

alpha-ketoglutarate gives rise to what amino acid?

Glutamate

17

Ribose-5-phosphate gives rise to what amino acid?

Histidine

18

Chorismate gives rise to what 3 amino acids?

Tryptophan
Tyrosine
Phenylalanine

19

The polypeptide subunit of elastin fibrils is?

Tropoelastin

20

What enzyme is required for the synthesis of elastin as well as of collagen?

Lysyl oxidase
- Collagen and Elastin both contain covalent crosslinks that are derived from allysine

21

The covalent crosslinks of elastin are similar to those of collagen except for what?

Desmosine, which is present in elastin but not collagen

22

Name the basic amino acids?

Lysine
Arginine
Histidine

- Carry a positive charge on the side chain

23

Name the acidic amino acids

Glutamate
Aspartate

- Have a carboxyl group in side chain that is negatively charged at pH 7

24

Name the aromatic amino acids

Phenylalanine
Tyrosine
Tryptophan

25

Tyrosine is formed from what?

Phenylalanine which is an essential amino acid

26

G proteins require what molecule for its active and inactive form?

GTP or GDP