This limitation is related to two distinctly different proliferation barriers: one is entering a typical irreversible non-proliferative but visible state, namely aging, and the other obstacle is crisis, including cell death.
This limitation is associated with two distinct proliferation barriers: one into a typical irreversible non-proliferation but visible state, namely aging, and the other with critical conditions, including cell death.
This restriction is related to two distinct proliferative barriers: one is to enter a typical irreversible non proliferative but visible state, i.e. aging; the other is crisis, including cell death.