SeamFIG 4G-I: Development of the seam through embryonic and post-embryonic stages.
G, insets of H, and I are epifluorescent images of transgenic animals expressing the ajm-1::GFP reporter in epithelial cells. (Strain source: H. Yu and P. W. Sternberg.) H, I are epifluorescence images of transgenic animals expressing the F09D12.15::GFP reporter in the seam. G Original magnification 600x; H, I original magnification 400x. (Strain source: The Genome BC C. elegans gene expression consortium; McKay et al., 2004.)
G. Early-L3-stage animal, left lateral view. Seam cells have undergone their stem-cell division during the L2/3 molt. Their anterior daughters will fuse with hyp 7. A post-deirid sensillum has formed and attaches to the hypodermis through adherens junctions (arrow).
H. Late-L4-stage animal, left lateral view. The 16 seam cells have reached their final stage, but have not yet terminally differentiated. Since they have not yet fused, adherens junctions still exist between each seam cell (inset, arrows).
I. Adult-stage animal, left lateral view. Seam cells have terminally differentiated and fused to make one syncytium of 16 cells on each side. Adherens junctions between cells have dissolved (inset).
See also SeamFIG 4A-F.
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