American Journal of Biochemistry and Biotechnology

Purification of Chymotrypsin-Trypsin Inhibitor from Winged Bean Seeds using Single Step Immunoaffinity Column

Sanhita Roy and Samir Kumar Dutta

DOI : 10.3844/ajbbsp.2009.142.146

American Journal of Biochemistry and Biotechnology

Volume 5, Issue 3

Pages 142-146


Problem statement: Winged bean is a rich source of protease inhibitors. The seeds of winged bean contain several serine protease inhibitors of which winged bean chymotrypsin-trypsin inhibitor (WbCTI) is of significant importance due to its dual inhibition of both chymotrypsin and trypsin. The purification of WbCTI has always been difficult and a time taking process that involved large number of steps and various purification columns. Approach: This study was focused on the single step method of purification of WbCTI to homogeneity from winged bean seeds using immunoaffinity column chromatography. Results: WbCTI was purified to homogeneity using anti-WbCTI antibody column in a single step which gave a single band on SDS-PAGE analysis and with almost one and half times more yield of purified protein than obtained from previously mentioned purification methods. Conclusion: This method using immunoaffinity column is high yielding and time saving process of purification.


© 2009 Sanhita Roy and Samir Kumar Dutta. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.