Vitamins Flashcards Preview

Biochemistry > Vitamins > Flashcards

Flashcards in Vitamins Deck (23)
Loading flashcards...
1

Water Soluble Vitamins

Bs and C

2

Fat Soluble Vitamins

ADEK

3

Vitamin B1 (VMGR)

Thiamin phosphorylated to thiamin pyrophosphate that carries aldehydes on thiazolium ring

4

FAD (VMGR)

Riboflavin (B2) w/ ribitol-ADP added, transfers 2e- and 2H+ on isoalloxazine ring

5

FMN (VMGR)

Riboflavin (B2) w/ phospho-ribitol added, carries 2e- and 2H+ on isoalloxazine ring

6

NAD+ (VMsGR)

Niacin (B3) w/ carboxylate converted to amide and ADP-ribose added, carries 2e- and 1H+ on nictonamide ring

7

NADP+ (VMGR)

NAD (from Niacin B3) w/ 2' hydroxyl of ribose of ADP phosphorylated, carries 2e- and 1H+

8

Difference in NADH/NADPH functions

NADPH coenzyme mainly used for reductive biosynthesis
NADH mainly used for breaking down food to generate ATP

9

Vitamin B5 (VMsGR)

Panthothenate modified w/ ADP and mercaptoish group to form COENZYME A and carries acyl groups on thiol

10

Pyridoxal Phosphate (3)

Derived from B6 (Pyridoxine) and exchanges Lys w/ AAs, important for AA metabolism

11

Folate (4)

Vitamin B9, modified to Dihydrofolate and Tetrahydrofolate (DHF and THF) to carry 1C units on pteridine N5 and/or N10

12

Biotin (3)

Vitamin B7, has lysine attached as prosthetic group to carry CO2 for CO2 transfer

13

Lipoic Acid

Has lysine prosthetic group to carry acetyls and 2e-

14

Cobalamine (4)

Vitamin B12, Has corrin ring that keylates a cobalt and transfers methyl groups

15

Vitamin C (3)

Can be reduced or oxidized, acts as 2e- donor for collagen biosynthesis

16

Vitamin K (3)

Quinone w/ 2 forms based on side chain that acts as 2e- donor for blood coagulation

17

Vitamin E (2)

Tocopherol that acts as free radical scavenger in vicinity of lipid membrane oxidation

18

Vitamin A

Beta-carotene (tetraterpene) modified into retinal and retinoic acid

19

Retinoic Acid Function

Binds nuclear hormone receptors to control gene expression of keratin in most epithelial tissues

20

Vitamin D (2)

Can make from cholesterol, better to UV stuff into cholecalciferol and calitriol (active)

21

Nucleic Acid Digested Products (2)

do NOT use for energy, do use as a source of phosphate

22

Coronary Heart Disease (3)

Trans and saturated fats increase risk, omega-6 FAs reduce

23

LDL vs. HDL

LDL is awful, HDL is great for you