title: Isolation of a neurotoxin with A presynaptic action from the venom of the black widow spider (Latrodectus mactans, Fabr.).
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D001740:Black Widow Spider; D003058:Cockroaches; D005260:Female; D007928:Lethal Dose 50; D008297:Male; D008970:Molecular Weight; D011506:Proteins / Q000494:pharmacology; D013112:Spiders; D013569:Synapses / Q000187:drug effects*; D014118:Toxins, Biological / Q000302:isolation & purification / Q000494:pharmacology; D014688:Venoms / Q000032:analysis*
chemical_list: D011506:Proteins; D014118:Toxins, Biological; D014688:Venoms