This image shows a macaque retina immunostained for the voltage-gated potassium channel subunit, K_V2.2 (green), red/green-cone opsin (red), and blue cone opsin (blue). The K_V2 channel subunits interacts with the K_V8.2 modifier subunit in photoreceptor inner segments where they underlie a potassium current important for normal photoreceptor function. For more information see the article by Gayet-Primo et al. (pages 3414–3427).