Toxicon
Scorpion toxin T 1 from Tityus serrulatus was tested for its effects on the isolated rat uterus preparation. T 1 (5 μg/ml) caused a contraction of the uterus, which was potentiated by neosligmine (1.64 × 10 −6 M) and abolished by atropine (1.4 × 10 −7 M). After addition of neostigmine to the bath, we noted a higher amplitude of the toxininduced contractions, and the...