Biotechnology: Science for the New Millennium Lab 9c

Using Ion Exchange Chromatography to Separate

Proteins

Ellyn DaughertySMBCP, San Mateo CAwww.BiotechEd.comwww.SMBiotech.com

www.emcp.com/biotechwww.sargentwelch.com/biotech

The Amylase Project Model of rDNA/protein Business

< Chapters 1-5 Basic SLOP

< Lab 5f Amylase PAGE (revised)

< Lab 6e Amylase Producing Bacteria

< Lab 6c Amylase Activity Assay

< Lab 6d Amylase ELISA and W Blot (new)

< Labs 7a/7b/7f/7g Amylase

Spectrophotometry

< Lab 8b Restriction Digestion of pAmylase

< Lab 4j/8b/8g DNA Gel Electrophoresis (revised)

< Lab 8c pAmy Transformation of E. coli

< Lab 9c/9d Amy Ion-Ex Chromatography

< Lab 8g/4h Genomic & plasmid DNA Isolation

< Lab 13i Amylase Gene PCR (new)

Using Chromatography to Study and Separate Molecules

Paper Chromatography

Paper chromatography. Molecules separate as they move up the paper. The distance that the molecules travel depends on their size and solubility in the solvent.

Thin-Layer Chromatography

Thin-layer chromatography. Molecules separate as they move through the silica gel. Thin-layer chromatography is used to separate small molecules, such as amino acids.

Using Chromatography to Study and Separate Molecules

Column Chromatography

How a Column Works

Column Chromatography

Open or Gravity Column

Column Chromatography

Gel-Filtration (Size-Exclusion) Chromatography

Gel Filtration Resin. When starting protein purification, technicians sometimes use a gel-filtration (size-exclusion) column first. They know the molecular weight of their protein, so they can often eliminate several contaminant proteins by a quick run through a sizing column.

Ion-Exchange Chromatography

Ion Exchange Resin. Resins are manufactured with ions attached. The ions present a certain degree of positive or negative charge, depending on the buffer pH.

Affinity Chromatography

Affinity Chromatography. Separating molecules based on shape is often done using antibody resin. Antibodies recognize only certain antigens and will bind those and pull them out of solution (fraction #3).

Fast-Performance Liquid Chromatography (FPLC)

Fast-Performance Liquid Chromatography. Pumps push the buffer or sample through tubing, into and through the column. As fractions come off the column, they are run through a spectrophotometer that determines the protein concentration of the sample.

Column Chromatography in Biomanufacturing

Column Chromatography in BiomanufacturingFast-Performance Liquid Chromatography

(FPLC)

High-Performance Liquid Chromatography (HPLC)

Greatly improved ability to separate, purify, identify, and qualify samples.

Biotechnology Curricular Support

www.emcp.com/biotechCheryl Monson

CMonson@emcp.comfor books/IRC help

www.BiotechEd.comfor PPTS, Syllabi, Acitivities,

Hints, Links, etcEllyn@BiotechEd.com

www.SargentWelch.com/biotechAmy Naum

for materials/equipment support Amy_Naum@vwreducation.com