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. 2024 Jan 15;13(1):bio060261. doi: 10.1242/bio.060261

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© 2024. Published by The Company of Biologists Ltd

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Fig. 7. — Aging induces structural and morphological changes of the DTC/niche. (A) Myristoylated-GFP expressed under a DTC-specific promoter, lag-2, visualizes the plasma membrane of the DTC/niche. The maximum Z projection is shown. LEPs: long external processes. SIPs: short intercalating processes. (B) A single Z plane of the myr-GFP image shown in Fig. 6A for each age. Arrow: DTC/niche gap. (A,B) Arrowhead: DTC/niche nucleus. (A,B) Scale bar: 20 μm. (C) The mean number of gaps in the DTC cap for all ages. (D) The size of the DTC gap, a region missing its plasma membrane for all ages. n=30, 30, 30, and 29 gonads for Day 1, 2, 3, and 4 respectively. (E) The number of detached DTC fragments, isolated small DTC/niche membranes. (F) The length of the detached DTC fragments. (E,F) n=10 gonads for all ages. (G) DTC nuclear volume was measured for all ages to estimate the changes in nuclear size. n=20 nuclei for each aging stage. (H) DTC nucleolar volume in all ages. n=5 nucleoli for each aging stage.