Topic B2 Flashcards
Structure and metabolism of β-carotene and derivatives of retinol (vitamin A)
1
Q
Give the structure of vitamin A (retinol) and the name of its derivates
A
2
Q
Occurence of retinol (vitamin A)
A
- Animal tissues as retinylester
- Occurs as lipids of animal origin
- Retinol + palmitic acid = retinylester
- Foods of vitamin A value:
- Butterfat
- Milk
- Egg yolk
- Liver (especially cod liver)
3
Q
Retinal
A
- Aldehyde
- Derivated from oxidation of retinol
- Retinol and retinal can be interconverted
4
Q
Retinoic acid
A
Derived from oxidation of retinal
5
Q
A
6
Q
Give the rection with β-carotene which happens in intestinal mucosa
A
7
Q
Metabolism of β-carotene
A
8
Q
Metabolism of β-carotene in cattle
A
