DNA damage foci accumulate at a subset of telomeres in cells expressing a mutant-template telomerase RNA. Immunostaining was done for telomere-protective.

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DNA damage foci accumulate at a subset of telomeres in cells expressing a mutant-template telomerase RNA. Immunostaining was done for telomere-protective protein TRF2 (green) and for the DNA damage response protein hRif1 (red). DNA damage foci accumulate at a subset of telomeres in cells expressing a mutant-template telomerase RNA. Immunostaining was done for telomere-protective protein TRF2 (green) and for the DNA damage response protein hRif1 (red). Note that not all telomeres (TRF2 spots) overlap with DNA damage foci, although each of the large DNA damage focal spots overlaps with one or more telomeres. Reproduced from The Journal of Cell Biology, 2004;167:819–830 by copyright permission of The Rockefeller University Press (10). Elizabeth H. Blackburn Mol Cancer Res 2005;3:477-482 ©2005 by American Association for Cancer Research

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