Vitamins - Squier Flashcards
Biotin
Coenzyme for carboxylation rxns
Pantothenic Acid
Aka B5
Transfer of acyl groups as component of CoA and FA Synthase
Vitamin C
Coenzyme in hydroxylation reactions critical in collagen biosynthesis
Vitamin B12
Enzyme cofactor for breakdown of odd-numbered FAs and methionine synthesis
Folic Acid
Aka B9
Transfers 1 C fragments in synthesis of AAs
Water Soluble Vitamins
Not stored
Regular dietary intake necessary
Non-toxic even in large quantities
Vitamin B2
Cofactors for oxidase and DH enzymes
Vitamin B3
Cofactor for oxidase and DH enzymes (active forms are NAD+ and NADP+)
Vitamin B1
Cofactor for enzymes such as PDH, a-ketoglutarate DH, and transketolase
Vitamin B6
Enzyme cofactor required for glycogen phosphorylase, heme synthesis, AA metabolism and conversion of tryptophan to niacin
Fat Soluble Vitamins
Vitamins E, K, A and D
Vitamin A
Important for:
Vision, epithelial cell differentiation, reproduction and fertility, and growth of bones and teeth
Vitamin D
Functions to maintain calcium and phosphate levels
Vitamin K
Functions in coagulation
Vitamin E
Functions as antioxidant and protective against heart disease
Iodine
Function: synthesis of thyroid hormones
Deficiency: goiter (enlarged thyroid)
Zinc
Function: structural or catalytic role
Deficiency: acrodermatitis enteropathica
Copper
Function: cofactors in enzymes that involve oxidation/reduction
Deficiency: Menke’s kinky hair syndrome
Iron
Function: oxygen transport
Deficiency: anema