estrogen-stimulated and nicotine-stimulated neurophysins ( esn and nsn ) were both found in large amounts in those areas of the brain and spinal cord where the concentrations of the nonapeptides were greatest , but when the molar ratios of esn to oxytocin and nsn to vasopressin were compared there was an excess of esn .
C0006104
brain
C0086045
concentrations