Figure 2.
lin-32 reporter gene expression during the ray sublineage. (A) The positions of ray precursor cells and their descendants in the lateral hypodermis, from mid-L3 to mid-L4. Green shading indicates the ray precursor cells (Rn cells), the ray neuroblasts (Rn.a cells) and their descendants. (B) The ray sublineage, beginning with the ray precursor cell, Rn, in mid-L3. The anterior daughter of the ray precursor cell is the ray neuroblast, Rn.a, which divides twice to give rise to the two ray neurons (RnA and RnB), the ray structural cell (Rnst) and a cell that undergoes programmed cell death ().(C,D,E) Expression of
lin-32 reporter genes. (C) Expression of
lin-32::lacZ in Rn cells, taken from Zhao (1995).
lin-32::gfp expression is only weakly detected in Rn cells (not shown), perhaps owing to the longer latency period of GFP. (D)
lin-32::gfp expression in nine Rn.a cells. (E)
lin-32::gfp expression in the nine pairs of Rn.aa and Rn.ap cells.