Yong N. Li, Taro Tsujimura, Shoji Kawamura and John E. Dowling
How are bipolar cells connected to specific photoreceptors in the retina? The photoreceptor connectivity of 321 bipolar cells in the adult zebrafish retina was determined. Nine major connectivity subtypes were identified — G, GBUV, RG, RGB, RGBUV, RGRod, RGBRod, RGBUVRod, and RRod bipolar cells. Their axonal stratification patterns, dendritic tree morphologies and size, and soma depth and size were also determined. This is the first comprehensive study of bipolar cell–photoreceptor connectivity in any retina.