CHP2 Chemistry of Life

Acid on c chain structural component in plasma

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Unformatted text preview: (corn, safflower oils) in • Need to make hormones & plasma membrane Lipids (cont.) Lipids 5 types of lipids (cont.)~ Triglycerides= ‘oils’ @ room temp • Neutral fats since f.acids of compound can’t donate (release) H+ to solution Phospholipids= -H2PO4 group replaces a f.acid on C chain • Structural component in plasma membrane…hydrophilic Structural ‘head’ (phosphate) & 2 hydrophobic ‘tails’ (f.acids) • Thus, are ‘amphiphilic’ Eicosanoids= ‘‘hormonelike’ chemical signals made of 20-C hormonelike’ compounds compounds • Prostaglandins play a role in inflammation, bld clotting, hormone action, labor contraction, bld vessel diameter hormone Steroids & cholesterol Steroids Steroids= C-chain arranged in 4 rings; cholesterol • Cholesterol- ‘parent’ steroid since other types made by combining cholesterol molecules • Arrangement of C=C on rings & functional grps results in variety of compounds: cortisol, progesterone, estrogens, testosterone, bile acids •...
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