[Properties of atropine interaction with the plasma membrane of myometrial cells].

Atropine binding with some vesicular preparations of pig myometrium cellular plasmatic membranes has been estimated by means of ultracentrifugation in order of membranes precipitation as well as of two-beam spectrofotometry designed for recording UV-spectrum absorption by the residual solutions containing atropin. While utilizing Langmuir probe of sorption isotherm rectilinear sites the affinity of binding centers to atropin (34 kJ/mol) and Kd = 1 mmM was measured. Fresing-defrosting of the membranes vesicular preparations provides for the sorption increase by 28% and the affinity decrease reaching 13 kJ/mol. The hypothesis was made about the prioritative correct orientation of vesicules.