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LIPID TRANSPORT

Lipoproteins• Lipids are transported in the blood as

lipoproteins• are soluble in water because the surface

consists of polar lipids.

2Lipid transport

Apolipoproteins +

Lipids:

Cholesterol

Cholesteryl esters

Triacylglycerols

Phospholids

lipoproteins

• Combine lipids with proteins and phospholipids.

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• The lipoprotein formed depends on the constituent protein and lipids

There are 4 types of lipoprotein

triglyceride

protein

Chylo VLDL LDL HDL

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Composition of lipoproteins

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7Lipid transport

TGTG

TGTGTG

TGTG

Bile salts

(emuslification)

TG

Fatty acidsglycerol

INTESTINE INTESTINALEPITHELIAL

CELL

TG

Cholesterol

apolipoproteins

LYMPH/BLOOD

chylomicrons

Lipases

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LIVER

Lipid transport

ADIPOSE MUSCLE

VLDLTGCholesterolCholesterol-esters

TGTG

LDLCholesterolCholesterol-esters

TGCholesterol

CMCONS

HDLCholesterol-esters

TISSUES

GONADS

ADRENALS

lymph

Fatty acidsalbumin

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Fat cell