BIO 1140 Chapter Notes - Chapter 4: Protein Structure, Hydrophile, Hydrogenation
22 Dec 2016
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Arranged linearly, each glucose molecule is either in alpha or beta position. Can be a fuel source for chemical energy: Can be a structural molecule: cellulose (plant) / chitin (fungi/insects) Polymers of amino acid (strung together by peptide bonds) Peptide bonds: bonds between carboxyl and amino group. Central atom with amino group, carboxyl group and radical group (r group) Unit for size: daltons (da) = 1 h in mass. 1 nucleotide diff. causes improper hemoglobin shape due to protein structure change. Globular: 1o: ma(cid:374)(cid:455) polar a. a. (cid:1006)o: ma(cid:374)(cid:455) alpha heli(cid:454) (cid:1007)o: globular. Fibrous: 1o: many non-polar a. a. (cid:1006)o: ma(cid:374)(cid:455) (cid:271)eta pleated sheets (cid:1007)o: fibrous. Functions: depends on shape and structure of protein. Long hydroc chain with carboxyl group at one end. Amphipathic: molecules have both polar and nonpolar region. Important for thermal reguln and protectn against mech. pressure. Cells can adjust saturation level of fatty acids to change fluidity of membrane. By adding/removing db: phosphoglycerolipids: main component of cell membrane.
