mbl-1 reduces DA synapse density. (A, B) GFP::RAB-3 expressed in all DA neurons (wyIs222) in wild type (A) and mbl-1(tm1563) (B). Gaps in mbl-1(tm1563) are indicated with arrowheads. Image is of the dorsal nerve cord and anterior is to the left. Scale bar represents 10 μm. (C) Synapse density difference per 100 μm in wyIs85 and mbl-1(tm1563). Error respresents standard error of the mean. ***P < 0.001, t-test.