Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Mapuroteni akatanga kurondedzerwa nomukemikari wokuNetherlands Gerardus Johannes Mulder uye akatumidzwa zita nomukemikari wokuSweden Jöns Jacob Berzelius muna 1838. Mulder akaongorora mapuroteni akawanda uye akawana kuti anenge ose aiva nemaumbirwo akafanana, C400H620N100O120P1S1. Akasvika pamhedziso yenhema yokuti dzingave dzakaumbwa nerudzi rumwe chete rwamamorekuru (makuru zvikuru). Shoko rokuti "protein" rinorondedzera mamorekuru aya rakataurwa nomushandi waMulder Berzelius; shoko rokuti protein rinobva mushoko rechiGiriki rokuti πρώτειος (proteios), rinoreva kuti "wokutanga", "anotungamirira", kana kuti "anomira pamberi", + -in. Mulder akapfuurira kuziva zvinogadzirwa nemapuroteni zvakadai seamino acid leucine yaakawana (inenge yakarurama) uremu hwemamolecular hwe131 Da. Pamberi pe"protein", mamwe mazita aishandiswa, akadai se"albumins" kana kuti "albuminous materials" (Eiweisskörper, muchiGerman). Masayendisiti okutanga ezvokudya akadai seGermany Carl von Voit aidavira kuti protein ndiyo yaiva zvokudya zvinokosha zvikuru pakuchengetedza chimiro chomuviri, nokuti zvaifungidzirwa kuti "nyama inoita nyama". Karl Heinrich Ritthausen akawedzera mapuroteni anozivikanwa nokuziva glutamic acid. PaConnecticut Agricultural Experiment Station ongororo yakadzama yemapuroteni emiriwo yakaunganidzwa naThomas Burr Osborne. Vachishanda naLafayette Mendel uye vachishandisa mutemo waLiebig wezvokudya zviduku pakudyisa makonzo okuedza, amino acids anokosha mukudya akagadzirwa. Basa racho rakaramba richiitwa uye raitaurwa naWilliam Cumming Rose. Kunzwisisa mapuroteni semapolypeptides kwakauya kuburikidza nebasa raFranz Hofmeister naHermann Emil Fischer muna 1902. Basa rinokosha remapuroteni semaenzayimu muzvinhu zvipenyu harina kunyatsozivikanwa kutozosvikira muna 1926, apo James B. Sumner akaratidza kuti enzyme urease yaiva puroteni. Nokudaro, fundo dzapakuvamba dzakanangidzira ngwariro pamapuroteni ayo aigona kucheneswa muhombe...  Mubvunzo: Ndiani akapa mapuroteni mazita?
Jöns Jacob Berzelius