Fig. 3.

Diversity of da neuron morphology and transcription factor expression. (A-D) Dendritic arbors of class I, II, III and IV da neurons (left to right). Arrowheads indicate regions of arbors that exemplify class-specific branching complexity. Cells are classified according to increasing arbor complexity. The expression status of transcription factors Cut, Knot, Abrupt and Spineless is listed below each morphological class. Filled boxes indicate expression, white boxes indicate no detectable expression. Progressively higher levels of Cut expression are indicated by progressively darker shadings (the degree of shading is not intended to indicate relative levels among the different transcription factors). Images in A-C reproduced with permission from Matthews et al. (Matthews et al., 2007). Scale bar: 50 μm.