p53 is a tumor suppressor protein.
P53 may also refer to:
p53 (band), an experimental music group p53 (album), their 1996 live album Curtiss XP-53, an American experimental fighter aircraft , a submarine of the Royal Navy , a patrol vessel of the Indian Navy P53 road (Ukraine) Papyrus 53, a biblical manuscript Pattern 1853 Enfield, a British rifle-musket P53, a state regional road in Latvia P53, a ThinkPad P series laptop