BCHE 395-15 2014 Lipids

Pylori bacterium found in 95 of paxents with gastric

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: phosphate group “head” at physiological pH •  Ester linked FA tails R3 R2 Double- tailed phospholipids tend to form bilayers Ex. PhosphaXdylcholine •  PhosphaXdylcholine : major component of most eukaryo9c cell membranes •  Many prokaryotes, including E. coli, cannot synthesize this lipid; their membranes do not contain phosphaXdylcholine Phosphodiester bond F.) Sphingolipids •  Backbone of sphingolipids is NOT glycerol •  Backbone is a long- chain amino alcohol sphingosine •  A fa"y acid is joined to sphingosine via an amide linkage rather than an ester linkage as usually seen in lipids •  A polar head group is connected to sphingosine by a glycosidic or phosphodiester linkage •  The sugar- containing glycosphingolipids are found largely in the outer face of plasma membranes Sphingolipids •  Also have a polar head group and two non- polar tails –  Carbons are sXll named 1, 2, 3 •  Carbon 1 can differ in groups a"ached to the X “head” à༎ X •  Lipids of the nervous system NoXce names associated with nervous system Sphingomyelins •  Ex. Ceramide (sphingosine + amide- linked fa"y acid) + phosphocholine a"ached to the alcohol •  Sphingomyelin is abundant in myelin sheath that surrounds some nerve cells in animals No...
View Full Document

Ask a homework question - tutors are online