title: Affinity chromatography at sub-zero temperatures. A model study with porcine pancreatic elastase.
abstract: A new variety of affinity chromatography of enzymes is described which consists of building up an affinity adsorbent composed of a real substrate. The chromatography is performed at a sub-zero temperature where the turnover of the enzyme is very low or stopped. As a model system Sepharose-bound L-trialanine p-nitroanilide was for used the affinity binding of porcine pancreatic elastase, which was adsorbed to the column in a hypersaline medium at--14 degrees and eluted from the column at the same temperature using 50% (v/v) ethylene glycol. The affinity adsorbent proved to be vary specific as it did not retain trypsin, chymotrypsin and ovalbumin and retained only 20% of cytochrome c.
mesh_terms: D000818:Animals; D002846:Chromatography, Affinity / Q000379:methods*; D005615:Freezing; D066298:In Vitro Techniques; D007700:Kinetics; D010179:Pancreas / Q000201:enzymology*; D010196:Pancreatic Elastase / Q000378:metabolism*; D013552:Swine
chemical_list: D010196:Pancreatic Elastase