Fig. 3.

C. elegans nAChRs. A. Major type of nAChRs and their tissue expression in C. elegans. Each subtype of the receptor is highlighted in different color. B. Locomotion circuit of C. elegans showing cholinergic motor neurons forming synapses onto both body wall muscles to cause contraction and onto GABAergic motoneurons that lead to release of GABA and cross inhibition of opposite muscles (Adapted from wormatlas.org). The nAChRs subtypes involved in the locomotion circuit are shown in different colors at muscle cell level. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)