Tarisa ndima iri pasi apa uye wozopindura mubvunzo unotevera mumutauro mumwechete sezvinoita ndima yacho: Passage: William Howard Stein (June 25, 1911 <unk> February 2, 1980) aive muAmerican biochemist. Mubvunzo: Wiliam Howard Stein akafa rini?
February 2, 1980