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<p>molecules; the amphiphilic nature of some lipids allows them to form structures such as <a href="page.php?w=vesicle_%28biology%29">vesicles</a>, multilamellar/<a href="page.php?w=unilamellar_liposome">unilamellar liposome</a>s, or membranes in an aqueous environment. Biological lipids originate entirely or in part from two distinct types of biochemical subunits or "building-blocks": <a href="page.php?w=%3Awikt%3Aketoacyl">ketoacyl</a> and <a href="page.php?w=isoprene">isoprene</a> groups. Using this approach, lipids may be divided into eight</p><p>
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