capable of expresses per tim neuron pacemaker neuron clock neuron FBbt:00006048 fly_anatomy.ontology Neuron that supports clock-gene oscillations under light:dark cycles or constant conditions, and participates in control of the diurnal rhythm of the organism. Molecular oscillation of Period and Timeless expression levels are central to the molecular mechanism of pacemaking, and are key criteria for defining a pacemaker cell (Kaneko, 1998). VFB:FBbt_00006048 regulation of circadian rhythm