Lipoproteins

Question 1

Chylomicron

Answer 1

Main Lipid: TAG

Apoprotein: B-48

Function: Transports dietary TAG to adipose and other tissues

Question 2

Chylomicron remnant

Answer 2

Main Lipid: TAG

Apoprotein: B-48

Function: Delivers remaining dietary TAG to liver. Exchanges TAG for Cholesterol ester from HDL; Delivers Cholesterol Ester to the liver.

Question 3

VLDL

Answer 3

Main Lipid: TAG

Apoprotein: B-100 (A,C,E)

Function: Transports endogenously synthesized TAG to adipose tissue and to skeletal and heart muscle.
Exchanges TAG for Cholesterol Ester from HDL

Question 4

IDL-VLDL remnant

Answer 4

Main Lipid: TAG and Cholesterol

Apoprotein: B-100 E

Function: Delivers remaining Tag and cholesterol to the liver. Exchanges TAG for cholesterol ester from HDL. Delivers cholesterol ester to liver

Question 5

LDL

Answer 5

Main Lipid: Cholesterol

Apoprotein: B-100

Function: Delivers cholesterol to liver and other cells

Question 6

HDL

Answer 6

Main Lipid: Cholesterol

Apoprotein: A’s (C,E)

Function: Accepts cholesterol from peripheral cells, esterifies it, and transports cholesterol esters to liver. Exchanges CE for TAG in VLDL, IDL and chylomicrons.

Atheroprotective and serves as a reservoir for circulating apoproteins that are transported to other lipoprotein molecules.