Midline lineages of VG+ cells in clusters ii and vi. A–C and G–I, Coexpression of VG (green) and UAS tau myc EGFP (magenta) driven by sim-GAL4 in cluster vi (A–C) and cluster ii (G–I). The arrowheads in G, H mark cluster vi cells that are visible in this focal plane. The remaining four VG+, GFP+ cells compose cluster ii. D–F, Coexpression of VG (green) and UAS GFP driven by MzVUM-Gal4 by cells in cluster vi. J–L, Coexpression of VG (green) and castor-lacZ (magenta) in cluster ii cells.