ScerGAL4oa2.R20C11 drives expression in motor neurons that form type III terminal buttons at the neuromuscular junction. Expression of ScerGAL4oa2.R20C11 is also detected in the brain, ventral nerve cord, in differentiated retinal cells in the eye-antennal disc, in one or two cells in each imaginal disc and in the neurons that innervate the pharyngeal muscles.