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Figure 8 - Rescue of serotonin-IR in mutants. Each graph indicates the percentage of worms containing one or more serotonin-IR neuron(s) following exposure to the indicated concentration (mM) of 5-HT (triangles) or 5-HTP (circles) in wild type, bas-1 and cat-4 worms (left to right). With no serotonin or 5-HTP present, ~100% of wild-type worms are serotonin-IR; 0% of bas-1 and cat-4 worms are serotonin-IR. Each point represents at least 100 worms. All data points connected with solid lines are from a single experiment (Expt. 1). For cat-4, data from a second experiment in which three concentrations were tested are also shown (Expt. 2, dashed lines); these results with 5-HT exposure were more typical than those of the first experiment.