Fig. 5. Scheme of the pharynx (A, grey; lateral view) with the flanking sensory neuron pair AWA ('amphid wing A'; right-AWAR, left-AWAL) including the cell bodies of sensory neurons surrounding the AWA cell body (AWAR) on the right. (Cell bodies, which can be stained by FITC, are colored red and those, which can be stained by DiI, are colored yellow.) Images (dorsolateral view, anterior at right, if not otherwise indicated) of transgenic C. elegans carrying a
pgp-2::GFP fusion construct (green fluorescence at blue light excitation): (B) superposition of a fluorescence and DIC image of C. elegans showing the expression of the
pgp-2::GFP fusion protein in the cell bodies of the amphid neuron pair AWAR and AWAL. The expression sites were identified by comparing the location of the AWA cell bodies with that of other sensory neurons stainable either with FITC (C; ASJ, ASH, ADF) or DiI (D; ASJ, ASH, AWB, ASI, ADL, and ASK) (yellow fluorescence at blue light excitation in both cases). In addition, the characteristic branched cilium morphology of the AWA neurons (E: scheme from [25]; F:
pgp-2::GFP fusion protein fluorescence) allowed the identification of the AWA neurons as origin of GFP fluorescence. (Bar: 25 μm in B-D and 12.5 μm in F.) (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this paper.)