Biochemistry: Nitrogen Metabolism

Question 1

Purely ketogenic AAs

Answer 1

Lysine
Leucine

Leprosy = KETONgin

AAs that may be converted to acetyl CoA or acetoacetyl CoA

Question 2

Ketogenic AND glucogenic AAs

Answer 2

Tryptophan
Phenylalanine
Isoleucine
Tyrosine

TRY PHilippine ISlands. TY.

*In some books, threonine is both glucogenic and ketogenic.

Question 3

Purely glucogenic AAs

Answer 3

All other AAs

May be converted to pyruvate or intermediates of the Krebs Cycle.

Question 4

Special AA products:

creatine, polyamines, nitric oxide

Answer 4

Arginine

Question 5

Special AA products:

Coenzyme A, taurine, glutathione

Answer 5

Cysteine

Question 6

Special AA products:

GABA, glutathione

Answer 6

Glutamate

Question 7

Special AA products:

Heme purines, creatine, glutathione, conjugated to bile acids, drugs and other metabolites

Answer 7

Glycine

Question 8

Special AA products:

Histamine

Answer 8

Histidine

Question 9

Special AA products:

S-adenosylmethionine, creatine, polyamines

Answer 9

Methionine

Question 10

Special AA products:

Sphingosine, purines, thymine

Answer 10

Serine

Question 11

Special AA products:

Serotonin, niacin, melatonin

Answer 11

Tryptophan

Question 12

Special AA products:

Catecholamines, thyroid hormones, melanin

Answer 12

Tyrosine