CLSM images demonstrating colocalization of aromatase (green) and calcium-binding proteins (red) CR, CB, and PV in the rhesus monkey hippocampus. (A–C) Colocalization of aromatase and CR in the hippocampus (subjects 26326, 27697, and 29357, respectively). (D–F) Colocalization of aromatase and CB in the hippocampus (subjects 30691, 28816, and 28816, respectively). (G–I) Colocalization of aromatase and PV in the hippocampus (subjects 30691, 28816, and 29628, respectively). (A) CR-immunoreactive neuron co-expresing aromatase (arrow) and two CR-immunoreactive neurons that do not co-express aromatase (arrowheads) in DG. (B) CR-immunoreactive neuron co-expressing aromatase in CA1. (C) Polymorphic layer (PL) of the dentate gyrus showing a CR-immunoreactive neuron that does not co-express aromatase. (D) Polymorphic layer of dentate gyrus showing a CB-immunoreactive neuron co-expressing aromatase. (E) CB-immunoreactive neuron co-expressing aromatase in the alveus of CA1. (F) Two CB-immunoreactive neurons co-expressing aromatase in CA2. (G) PV-immunoreactive neuron that does not co-express aromatase in the DG. (H,I) PV-immunoreactive neurons co-expressing aromatase in CA3. Scale bar in I: 25 μm.