ANIMLSCI 332 Lecture Notes - Rhodopsin, Mucus, Opsin

• School: UMASS-Amherst
• Department: Animal Science
• Course: ANIMLSCI 332
• Professor: Mark Huyler

Document Summary

Organic compounds that are required in very small amounts. Water soluble (most of which are enzyme cofactors- required for various reactions, such as b12) Synthesis of water-soluble vitamins also occurs in the lower gut of monogastric animals but there is (generally) no absorptive mechanism, unless the animal practices coprophagy. Retinoids: several different forms retinol, retinal, retinoic acid. Carotenoids (600 carotenoids; <10% have vit a activity) Only about 10% have vit a activity. B- carotene carotenoids occur in plants (vit a does not). If you cleave in the middle, it give you vit a. fortify milk with vit a. Many double bonds, which are easily oxidized resulting in lost activity. Stored feed hay and grain ( -carotene), frost damage, fermentation all results in losses of -carotene. Vit a does not occur in plants ( -carotenes do). Carotene provides 2 units of vit a (1/2 cup of carrot juice provides 20,000iu of vit a;