Carotenoid bioavailability ranges between 1/5 to 1/10 of retinol's.
Assessment of retinol-binding protein is used to determine visceral protein mass in health-related nutritional studies.
Members of this enzyme family metabolize a wide variety of substrates, including ethanol, retinol, other aliphatic alcohols, hydroxysteroids, and lipid peroxidation products.
It may, however, be consumed indirectly, in the form of carotenoids such as beta carotene, which can be cleaved to form two retinol molecules.
Retinol was released as part of this denaturation and it has been speculated whether such a structural transition has a functional role in ligand binding and release (see section 16).
As for the subsequent stages of photolysis that lead to the generation of all-trans retinol in intact cells, they need a special experimental and theoretical analysis.
Tumor formation in mice with somatic inactivation of the retinoblastoma gene in interphotoreceptor retinol binding protein-expressing cells.
Lipocalins include the homologues retinol-binding protein with an 8-stranded b-barrel, and retinoic acid-binding protein with a 10-stranded b-barrel.
