Telomere T-Loop Capping & DNA Damage Checkpoint (2D)

This simulator draws one chromosome end in 2D and models the molecular decision that underlies replicative senescence: can the shelterin complex still fold the telomere into a protective T-loop? Set the double-stranded telomere length and shelterin availability, then trigger cell divisions — each one shortens the telomere through the end-replication problem — and watch the T-loop's stability fall, the DNA-damage response climb, and the cell cross over into senescence once the chromosome end can no longer be hidden from the repair machinery. A population panel runs thousands of independent lineages through the same rule and checks the measured average division-count-to-senescence against a closed-form formula.