Protein Purification
Protein Extraction
Differential Centrifugation
Salting Out
Column Chromatography
Ion-Exchange Chromatography
Anion-Exchange Chromatography
Size Exclusion Chromatography
Affinity Chromatography
Specific Activity
Native Gel Electrophoresis
SDS-PAGE Strategies
Isoelectric Focusing
Diagonal Electrophoresis
Mass Spectrometry
Mass Spectrum
Tandem Mass Spectrometry
Peptide Mass Fingerprinting
Overview of Direct Protein Sequencing
Amino Acid Hydrolysis
Chemical Cleavage of Bonds
Edman Degradation
Edman Degradation Sequenator and Sequencing Data Analysis
Edman Degradation Reaction Efficiency
Ordering Cleaved Fragments
Strategy for Ordering Cleaved Fragments
Indirect Protein Sequencing Via Geneomic Analyses

Concept #1: Diagonal Electrophoresis

Practice: Which of the following techniques is used specifically to help determine the site of a disulfide bond?

Concept #2: Interchain vs. Intrachain Disulfides

Practice: In the plot below, circle the point(s) representing peptides with intrachain disulfides.

Practice: A gene encoding a protein with a single disulfide bond undergoes a mutation that changes a serine residue into a cysteine residue. You want to find out whether the disulfide pairing in this mutant is the same as in the original protein. Briefly layout a diagonal electrophoresis experiment to determine the answer.