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Protein & Peptide Letters

Editor-in-Chief

ISSN (Print): 0929-8665
ISSN (Online): 1875-5305

Stability Of A Black Eyed Pea Trypsin Chymotrypsin Inhibitor (BTCI)

Author(s): Luciano Paulino da Silva, Jose Roberto S.A.Leite, Carlos Bloch Jr. and Sonia Maria de Freitas

Volume 8, Issue 1, 2001

Page: [33 - 38] Pages: 6

DOI: 10.2174/0929866013409715

Abstract

The stability of BTCI has been investigated as function of pH and temperature, following its inhibitory activity against trypsin. The isolated inhibitor of 9,084 Da is stable over pH 3 to 10 at 25 o C. BTCI showed high thermal stability ranging from 25 to 95 o C at pH 3.0 and 7.0. However, the protein lost about 20 percent of its inhibitory activity over 75 o C at pH 8.2. The results indicated that BTCI is extremely stable to heat and pH as typical of Bowman-Birk inhibitors.

Keywords: TRYPSIN CHYMOTRYPSIN INHIBITOR, chymotrypsin


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