Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1982 Jul-Aug;45(4):427-33.
doi: 10.1021/np50022a011.

Purification and some properties of two proteinase inhibitors from Erythrina acanthocarpa seed

F J Joubert

Purification and some properties of two proteinase inhibitors from Erythrina acanthocarpa seed

F J Joubert. J Nat Prod. 1982 Jul-Aug.

Abstract

Two proteinase inhibitors (DE-1 and DE-2) were purified from Erythrina acanthocarpa seed by gel filtration followed by ion exchange chromatography on DEAE-cellulose and DEAE-sepharose. They contain 163-164 amino acids (molecular weight 18000) including four half-cystine residues and resemble the Kunitz-type proteinase inhibitors. The N-terminal amino acid sequence of DE-1 also shows homology with those of the Kunitz-type inhibitors. For DE-2 no free N-terminal amino acid was found. DE-1 contains a potent inhibitor for both porcine trypsin and bovine alpha-chymotrypsin. Inhibitor DE-2 inhibits alpha-chymotrypsin strongly and it has practically no action on trypsin.

PubMed Disclaimer