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Biochemistry C 785 Study Guide

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WGU Biochemistry C 785 Study Guide Page 10 Video Notes for Units 2-7 Unit 2 – Amino Acids, Peptide Bonds, Protein Structure  Amino Acid: building blocks of proteins  Monomer: single amino ... acid  Polymer: amino acid chain of linked monomers called polypeptides  Amino Group: N with at least 1 H, can be NH2 or NH3  Hydrogen Hat: between amino group and carboxyl group, attached to alpha carbon  Variable Group “side chain” “R”: unique portion of amino acid  Carboxyl Group: C with 2 attached O’s, can be COOH, or COO  Hydrophobic Amino Acid: consists only of carbons and hydrogens end in H, CH, CH2, CH3 – they are nonpolar –Hydrophobic interactions occurs between two nonpolar amino acids H, CH, CH2, CH4, are the weakest type of bond – but the most important type for protein structure – are broken with heat (increased temperature)  Polar Amino Acid: end in OH, NH, SH, create hydrogen bonds, can be broken by changes in pH or changes in salt concentration.  SH: Disulfide bond/bridge made by SH side chains, is strongest, fewest in number, and only broken with reducing agents  Peptide Bonds: form at amino group and carboxyl group, “loss of H2O”  Ionic Bonds: occurs between two amino acids with opposite charges (charged amino acids, -/+, negative is acidic positive is basic), are broken with pH changes or changes in salt concentratio [Show More]

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