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- W1857726579 abstract "Abstract : The effects of cardiotoxin on the contractility, absolute refractory period and action potential of cariac muscle have been studied in isolated left atrial preparations of rats and right ventricular strips of guinea-pigs respectively. The transmembrane potential of the guinea-pig ventricular muscle cell is irreversibly depolarized by cardiotoxin. The duration and overshoot of action potential are both decreased by cardiotoxin. Cardiotoxin, Cobramine B, the direct hemolytic factor (DLF), toxin gamma and cobra venom cytotoxin are all the most basic polypeptides isolated from cobra venoms. Cardiotoxin affects various kinds of cells, causing irreversible depolarization of cell membrane. It also has a weak direct hemolytic activity on washed erythrocytes of the guinea pig, dog and cat, and shows cytopathic effects of stable tumor cell cultures (HeLa, KB). Both the contracture-inducing and direct hemolytic activities of cardiotoxin can be potentiated by phospholipase A, and prevented by polyanions (gangliosides, RNA and heparin). From these results, it is concluded that cobramine B, DLF, and possibly cobra venom cytotoxin and toxin gamma are all identical with cardiotoxin or at least may be grouped as 'isotoxins' of cardiotoxin." @default.
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- W1857726579 date "1971-03-01" @default.
- W1857726579 modified "2023-09-27" @default.
- W1857726579 title "Studies on Cardiotoxin Isolated from Cobra Venom: I. Effects of Cardiotoxin on Contractility, Absolute Refractory Period, and Action Potentials of Cardiac Muscle. II. Identification of Cardiotoxin with Cobramine B, DLF, Toxin gamma and Cobra Venom Cytotoxin" @default.
- W1857726579 doi "https://doi.org/10.21236/ad0724158" @default.
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