Chem 336 - Spring 1999 - Organic Chemistry III
Portland State University - Dr. Carl C. Wamser
Chapter 27 Skills
know the terminology:
amino acid, essential amino acid, amino acid residue
peptide, polypeptide, protein, enzyme
N-terminus, C-terminus, alpha-helix, beta-sheet
zwitterion, isoelectric point, electrophoresis
know the structures of the 20 common amino acids by name and 3-letter abbreviation
know the approximate pKa values for the amino acids
understand the relationship between the pKa values of amino acids and peptides and the different ionization states they may assume in solutions depending on the pH
understand the classification systems for proteins
based on composition (simple or conjugated)
based on shape and solubility (fibrous (insoluble) or globular (soluble))
based on function (enzymes, structural, etc.)
understand the classification system for protein structural features:
primary: amino acid sequence
secondary: chain conformations (alpha-helix, beta-sheet)
tertiary: 3-d structure of the entire protein
quaternary: interactions of multiple polypeptide chains
recognize the various reactions of amino acids and peptides:
peptide bonding
disulfide bonding
ninhydrin test
Edman degradation
BOC protecting group
cleavage by chymotrypsin and trypsin
identify the expected state of ionization of amino acids or peptides based on a given pH and their pKa values
name and give abbreviations for simple peptides
indicate the steps necessary for peptide sequencing
indicate the steps necessary for a peptide synthesis
identify features that contribute to the various levels of protein structure
determine the amino acid sequence of a polypeptide based on partial hydrolysis and other results