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VITAMINS. VITAMIN A. VITAMIN D. vit. D 3 ( cholecalciferol ). VITAMIN E AND DERIVATIVES OF FLAVONE ( antioxidants !). VITAMIN K. THE ROLE OF VITAMIN K IN BLOOD CLOTTING, THE ACTION OF ANTICOAGULANTS. VITAMIN C (ASCORBIC ACID).
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VITAMIN D vit. D3 (cholecalciferol)
VITAMIN E AND DERIVATIVES OF FLAVONE (antioxidants!)
THE ROLE OF VITAMIN K IN BLOOD CLOTTING, THE ACTION OF ANTICOAGULANTS
VITAMIN C (ASCORBIC ACID) ascorbic a. dehydroascorbic a.
VITAMIN B2 vit. B2 (riboflavine) flavine adenine dinucleotide (FAD) reducedform colorless oxidizedform yellow
FOLIC ACID folic acid (pteridine, p-aminobenzoic acid, glutamic acid)
Saccharides (Gr. sakcharon, sugar) – the most abundantbiologicalmolecules = Carbohydrates, „carbonhydrates“, (C.H2O)n STRUCTURE: Serve as: (1) fuels, energystores (2) componentsofnucleicacids (3) linked to proteins, lipids, role in cell-cell recognition (4) ground substance ofconnectivetissues
TRIOSES, D-FAMILY OF SACCHARIDES Glyceraldehyde – a single asymmetriccarbon (D- and L-variant)
DERIVATION OF CYCLIC FORMS: - based on hemiacetal/hemiketalformation!
CHEMICAL PROPERTIES (1) OXIDATION / REDUCTION
FORMATION OF OSAZONES (condensationwithphenylhydrazine)
(3) FORMATION OF GLYCOSIDES - based on acetal formation!
ASCORBIC ACID - DERIVATIVE OF GULONIC ACID (glucose – glucuronic a. – gulonic a. – oxidizedgulonolactone)
POLYSACCHARIDES: STARCH, GLYCOGEN, DEXTRAN, INULIN
ground substance ofconnectivetissuescontainsproteoglycans composedofglycosaminoglycans (GAG) and proteins AMINO SUGARS OF GLYCOSAMINOGLYCANS:
REPEATING SUBUNITS OF GLYCOSAMINOGLYCANS (HYALURONIC ACID, CHONDROITIN SULPHATE) Noticeacidicgroupsgiving negative charges!
PROTEOGLYCAN ARCHITECTURE (GAG + protein)
ATTACHEMENT OF SACCHARIDES TO PROTEINS via O-glycosidic and N-glycosidiclinkages
HEPARIN -sulfatedglycosaminoglycan not found in connectivetissues!