Keratin 19-positive cells

Donor age decreases keratin 19-positive cells in humans.

“The proportion of K19-positive-cells was greater in newborn than older foreskins.”

Humansin newborn vs older donorsforeskin

Keratin 19 as a biochemical marker of skin stem cells in vivo and in vitro: keratin 19 expressing cells are differentially localized in function of anatomic sites, and their number varies with donor age and culture stage

Journal of cell science·1 May 1996