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15 Cards in this Set

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Retinoids
(Vit A)
Visual pigment of Rhodopsin. Retinoic acid regulates cell differentiation. Embryogenesis, postnatal growth. Reproductive function.
Vit D
Vit D3 (cholecalciferol) formed by action of UV radiation in skin. 25-Hydroxylation (in liver)and 1-hydroxylation (In kidney). Rate limiting is in kidney. ­ by PTH and hypophasphatemia
Tocopherol
Vit E
Not well understood. Antioxidant activity, 1st line of defense against lipid peroxidation.
Vit K
Carboxyglutamate is formed in liver and occupies region on 5 blood clotting factors, Ca++ chelators
Ascorbic Acid
(Vit C)
Reducing agent. Hydroxylation rxns. Ex: Hydroxyproline/lysine in collagen. Reduce methenoglobin Tyrosine hydroxylated in rate limiting step of cateciolamine syn. G-6-P can for L-Ascorbic Acid
Cobalamine (B12)
(most complex)
Methylcobalamine and 5’ deoxyadenosylcobalamine are coenzyes. One regenerated THF. Transfer H groups.
Folic Acid (B9)
Converted to Tetrahydrofolate (THF) by dihydrofolate reductase. The transfers 1 carbon unit. Synthesis of purine Nucleotides and Thymine.
Pyridoxine (B6)
Prosthetic group for A.A. metabolism. Heme biosynthesis of Neuro Transmitters.Move nitrogen or amino groups (glutomate)
Folic Acid (B9)
Converted to Tetrahydrofolate (THF) by dihydrofolate reductase. The transfers 1 carbon unit. Synthesis of purine Nucleotides and Thymine.
Pyridoxine (B6)
Prosthetic group for A.A. metabolism. Heme biosynthesis of Neuro Transmitters.Move nitrogen or amino groups (glutomate)
Pantothenic Acid (B5)
Constituent of CoA
Biotin (B4)
Prosthetic group of metabolic enzymes catalyzing carboxylation rxn.
Niacin (B3)
Part of universal electron carriers NAD+/NADH
Riboflavin (B2)
Part of FMN and FAD (coenzyme)
Thiamine (B1)
Precursor of Thiamine Pyrophosphate. A coenzyme of pyruvate dehydrogenase. Ex: Decarboxylation