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Unformatted text preview: -1-Figures for Lecture 4 30 August 2010 (P. J. Hollenbeck)BIOL 231(Be sure to also download the notes after lecture)(A) LIPIDSSteroids like cholesterol have planar ring “backbones,” meaning that all the carbons in the ringsshown here in green lie nearly in one plane:The other lipids we will consider, phospholipids, have a glycerol backbone. Two fatty acids arecoupled to glycerol by ester linkages, and a polar head group is coupled to the third carbon ofglycerol via a phosphodiester linkage. This is a diagram of phosphatidylcholine:-2-(B) CARBOHYDRATESSimple sugars – monosaccharides like fructose or glucose, below – can take linear or ring form. They are the subunits for the formation of disaccharides, oligosaccharides, and polysaccharides. Sugars are covalently linked to each other in 2 ways that differ in the position of the -OH group onthe first carbon. These are referred to as α and β linkages. Connecting identical glucose subunits viadifferent linkages creates polymers with...
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This note was uploaded on 09/18/2011 for the course BIOLOGY 231 taught by Professor Petethollenbeck during the Fall '10 term at Purdue.
- Fall '10