Transgenic C. elegans with Pnlp-17::mScarlet in extra-chromosomal arrays (Mello et al., 1991) displayed consistently bright red fluorescence in two bilaterally symmetric neurons consistent with PVQ neuron position and morphology, in both males and hermaphrodites.
The C+C enhancer (pOK17.21) activates frequent expression in all pharyngeal muscles. the C+C enhancer also activates expression in non-muscle cells in the pharynx. Expression induced by the C+C enhancer was observed in all pharyngeal cell types including gland cells, neurons and marginal cells as well as muscles. These results define C as an organ-specific subelement.