SPHINGOMYELIN - (Fig. 7) . Cholesterol tends to make...

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SPHINGOMYELIN Sphingomyelin is a nonglycerol phospholipid in cell membranes, contains two hydrocarbon chains linked to a polar head group formed from serine rather than glycerol (Fig. 6) . Glycolipids Many cell membranes also contain GLYCOLIPIDS (Fig. 8) . Glycolipids consist of two hydrocarbon chains linked to polar head groups (like serine) that contain carbohydrates. CHOLESTEROL Cholesterol is also found in and in contrast to phospho- and glyco-lipids, consists of four hydrocarbon rings rather than linear hydrocarbon chains
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Unformatted text preview: (Fig. 7) . Cholesterol tends to make membranes more rigid because of the inflexible ring structures. The hydrocarbon rings are strongly hydrophobic, but the hydroxyl group attached to one end of cholesterol is weakly hydrophilic, so cholesterol is amphipathic. Steroid hormones, such as testosterone, are derivatives of cholesterol (Fig. 7) . These hormones are a diverse group of chemical messengers, all of which contain four hydrocarbon rings to which distinct functional groups are attached....
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This document was uploaded on 11/03/2011 for the course BIOLOGY MCB2010 at Broward College.

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