![](https://nthumb.tpgimages.com/mid2_com_img/1339/17586/TOP16633939.jpg)
Lipoprotein, illustration. This is a low density lipoprotein (LDL), or 'bad' cholesterol, molecule. It consists of a core of esterified cholesterol molecules surrounded by a shell (green and yellow) of unesterified cholesterol and phospholipids. The complex structure includes carrier proteins (blue) known as apo-B proteins, which assist transport in the blood. When there are high levels of LDL cholesterol in the blood it builds up on the sides of blood vessels hardening them, a condition named atherosclerosis. This narrows the blood vessels and may block them.
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TOP16633939
Source:
達志影像
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RM
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