Figure 4. Gustatory receptor neurons (GRNs) are highly interconnected via chemical synapses.

(A) Connectivity matrix of GRNs in the right hemisphere. GRN groups are color-coded and ordered according to Figure 2, with number of GRNs/group in parentheses. Color coding within the matrix indicates the number of synapses from the pre- to the postsynaptic neuron, indicated in the legend. (B) Connectivity between GRN groups. Colors correspond to groups in Figure 2. Arrow thickness scales with the number of synapses, indicated in red. (C) Connectivity between GRN groups as in (B), showing only connections of five or more synapses. Group # and corresponding taste category are noted on the right.

Figure 4—figure supplement 1. Predicted neurotransmitters expressed by gustatory receptor neurons (GRNs) of the right hemisphere.

Neurotransmitter predictions for each neuron (groups in Figure 2). The fraction of synapses predicted to contain each neurotransmitter is indicated by color.

Figure 4—figure supplement 2. Predicted neurotransmitters expressed by gustatory receptor neurons (GRNs) of the left hemisphere.

Neurotransmitter predictions for each neuron (groups in Figure 3—figure supplement 1). The fraction of synapses predicted to contain each neurotransmitter is indicated by color.