[jwco]

Thanks, but it's not clear to me that cells die without telomeres or at this Hayflick limit. http://en.wikipedia.org/wiki/Hayflick_limit says they enter senescence. They stop dividing. This seems different than cell death.

That is interesting to me too though. I don't know why cells should stop dividing without telomeres, or with telomeres below a critical length. That suggests to me there is interaction with other cellular machinery at this onset of senescence.