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. 2001 Jun 11;153(6):1287–1300. doi: 10.1083/jcb.153.6.1287

Figure 2.

Figure 2

Figure 2

The luminal segment of CLIMP-63 is required for nuclear envelope exclusion and mobility. COS cells were transiently transfected with wt-GFP (A–C) or Δlumen-GFP (D–F). 48 h after transfection, the cells were fixed with 3% paraformaldehyde, stained with monoclonal antibodies against the ER marker BAP31 (B and E) and analyzed by CLSM. Note that the construct lacking the luminal segment is no longer excluded from the nuclear envelope (D and F). (G) Quantification of FRAP experiments comparing the diffusion and mobility wt-GFP (•) with Δlumen-GFP (○). A representative, transiently transfected cell was photobleached over a 2-μm wide strip covering the ER. Mean fluorescent intensities in the strip were plotted versus time. The prebleach intensity was normalized arbitrarily to 100%. The least square fits to are indicated as lines. Note the excellent correlation between experimental data and fitting.