Two independent transgenic strains were created that expressed GFP under the control of the
ctn-1 promoter (Pctn-1) and
slo-1 promoter (Pslo-1), respectively. The expression pattern of
ctn-1 largely overlapped with that of
slo-1. Specifically, both
ctn-1 and
slo-1 were expressed in many neurons and several types of muscles, including body-wall muscle, vulval muscle and stomatointestinal muscle. However,
slo-1 appeared to be expressed in more neurons in the head than
ctn-1, whereas
ctn-1 was expressed in pharyngeal muscle cells and some other unidentified cells that did not express
slo-1.