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Total, nonspecific and specific OXTR binding in the human SN. (a) Total 125I-OVTA binding. (b) 125I-OVTA binding in the presence of 100 nM of OXTR antagonist ALS-II-69. (c) Digital subtraction of (b) from (a) to yield specific OXTR binding. (d) Nissl-stained tissue section showing the large, dopaminergic neurons of the pars compacta.
