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. 2022 Dec 20;13:7672. doi: 10.1038/s41467-022-35286-2

Fig. 5. STREAMING-tag system enables quantification of transcriptional dynamics near transcription start site.

Fig. 5

a Structure of the Nanog gene in a cell line (Nanog-STREAMING-PP7) in which the STREAMING-tag is knocked in biallelically near the TSS of Nanog and a PP7 repeat is knocked in monoallelically in the Nanog 3’UTR. b A cell line derived from Nanog-STREAMING-PP7 cells and stably expressing MCP-RFP/PCP-HaloTag/mTetR-mNG was established and subjected to live imaging. Representative images of a cell in which MCP-RFP, PCP-HaloTag, and mTetR-mNG spots were observed. Filled white arrowheads indicate locations where MCP-RFP, PCP-HaloTag, and mTetR-mNG spots were observed simultaneously. Unfilled white arrowheads point to locations where MCP-RFP and mTetR-mNG spots were observed simultaneously. Scale bar, 3 µm. c Time laps images of MCP-RFP and PCP-HaloTag at 1 min intervals in a cell line used in b. d Dynamics of the mean fluorescence intensity of the MCP-RFP and PCP-HaloTag at MCP-RFP transcription sites in c. e Cross-correlation between MCP-RFP and PCP-HaloTag mean spot intensity dynamics. Error bars indicate 95% CI (n = 20 cells). The graph on the right shows an enlarged view of the square of the graph on the left.