Systemic reactions occur within one hour; the person could develop breathing problems, weakness and chest pain. | Symptoms are usually mild and stop within a few days, but severe symptoms that last several days are possible. A latrotoxin is a high-molecular mass neurotoxin found in the venom of spiders of the genus Latrodectus (widow spiders). The pore is not only permeable for cations, but also for water. (ABSTRACT TRUNCATED AT 250 WORDS), NLM alpha-Latrotoxin was about 10-fold less potent in locust than in rat synaptosomes.
Two tiny red fang marks appear at the site where the bite occurred. All Rights Reserved, BLACK WIDOW SPIDER BITES AFFECT THE NERVOUS SYSTEM. 1993 Sep 15;268(26):19650-5.  So because of the channel and the insertion in the cell membrane the protein makes the cell more permeable to substances that can pass through the channel. It helped identify two families of important neuronal cell-surface receptors. The venom of the black widow is a neurotoxin, meaning it affects nerves and nerve tissue. α-Latrotoxin was about 10-fold less potent in locust than in rat synaptosomes. Since the species helps determine the treatment, the dead spider - if it can be found - should be taken with the victim to a hospital emergency department. For three former BYU football stars, Sunday’s NFL action brought about positive results in team wins.
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