1. Aqueous extracts of Enterolobium contortisiliquum seeds contain an endopeptidase of M(r) 60,000 with specificity for basic amino acid residues. The enzyme was purified by chromatography on DEAE Sephadex, followed by gel filtration on Sephadex G-75 and affinity chromatography on Zinc-Sepharose.
Kunitz-type trypsin inhibitors bind to the active pocket of trypsin causing its inhibition. Plant Kunitz-type inhibitors are thought to be important in defense, especially against insect pests. From sequence analysis of various Kunitz-type inhibitors from plants, we identified CaTI2 from chickpea as
A trypsin inhibitor was isolated from Enterolobium contortisiliquum seeds. Starting with a saline extract, ECTI (E. contortisiliquum trypsin inhibitor) was purified as a homogeneous protein by acetone precipitation, ion-exchange chromatography (DEAE-Sephadex A-50), gel filtration (Sephadex G-75 and
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