An unc-108 (Rab2) null mutant has normal levels of processed FMRFamide neuropeptides in its dorsal nerve cord. Identically scaled representative images of native FMRFamide neuropeptide and GABAergic synapse immunostaining in the dorsal axons of wild type (top) and the unc-108(nu415) null mutant (bottom). The text in each image states the means and SEMs of the FMRFamide/GABAergic synapse fluorescence intensity ratio from 14 to 15 animals per strain. P = 0.98 (Mann-Whitney test). See Materials and methods for further details.