Adenine suna ne da ke nufin tushen purine, ɗaya daga cikin nucleobases guda huɗu da aka samu a cikin kwayoyin DNA da RNA. Adenine nau'i-nau'i tare da thymine a cikin DNA ko tare da uracil a cikin RNA. Adenine yana wakilta da harafin "A" a cikin lambar kwayoyin halitta. Har ila yau, muhimmin sashi ne na adenosine triphosphate (ATP), kwayoyin da ke samar da makamashi don tafiyar matakai na salula.