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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Inhibitory potency of Erythrina variegata proteinase inhibitors toward serine proteinases in the blood coagulation and fibrinolytic systems.

The Erythrina variegata Kunitz family trypsin inhibitors, ETIa and ETIb, prolonged the activated partial thromboplastin time (APTT) and also the prothrombin time (PT) of human plasma, but the Kunitz family chymotrypsin inhibitor, ECI, and Bowman-Birk family inhibitor, EBI, from E. variegata hardly prolonged these times. Trypsin inhibitors ETIa and ETIb inhibited the amidolytic activity of factor Xa, and ETIb but not ETIA inhibited plasma kallikrein. Neither ETIa nor ETIb exhibited any inhibitory activity toward beta-factor XIIa and thrombin. Furthermore, trypsin inhibitors ETIa and ETIb inhibited plasmin, a serine proteinase in the fibrinolytic system, whereas ECI and EBI did not. These results indicate that Erythrina Kunitz proteinase inhibitors possess different potency toward serine proteinases in the blood coagulation and fibrinolytic systems, in spite of their high similarity in amino acid sequence.[1]

References

  1. Inhibitory potency of Erythrina variegata proteinase inhibitors toward serine proteinases in the blood coagulation and fibrinolytic systems. Nakagaki, T., Shibuya, Y., Kouzuma, Y., Yamasaki, N., Kimura, M. Biosci. Biotechnol. Biochem. (1996) [Pubmed]
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