It’s one sequence, over and over, for humans: TTAGGG

every time your cells divide, they lose a little bit off the end of the telomeres, which fails to be replicated. At birth your telomeres are 11,000 bases long, when you’re old and gray they’re about 4,000 bases long

— labcoat lesbian @ NYC Pride + AC (@JUNIUS_64) June 21, 2018