Fig. 6. Identification of the sdf-9-expressing cells. (A) Expression of sdf-9p::RFP (left) and DAF-9::GFP (middle) in an adult animal. Only the left-hand cell is in focus. A merged image (right) shows that RFP (nuclear) and GFP (perinuclear) are expressed in the same cell. Scale bar: 10 µm. (B) Cell lineage of the candidates of sdf-9-expressing cells (not boxed) and the neurons that express the GFP markers (boxed). The candidates are selected by their positions in the head and by the absence of che-2 expression (Fig. 7). Mosaic experiments indicated that sdf-9-expressing cells are XXXL and XXXR, which are indicated by asterisks. a: anterior, p: posterior, d: dorsal, v: ventral, l: left, r: right. (C) Cell lineages of the cells expressing sdf-9::RFP and the GFP marker cells as deduced from the mosaic experiments. Only the topology but not the left-right relationship in these lineages is relevant. The sublineages of five cells in the most left lineage and three cells in the most right lineage could not be determined from the data shown in Table 4.

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