Mulder akaita elemental kuongorora zvakajairika mapuroteni uye vakawana kuti anenge zvose mapuroteni aiva chete empirical fomura, C400H620N100O120P1S1. Akauya kuti kukanganisa mhedziso kuti vangadaro rinoumbwa chete mhando (guru chaizvo) morekuru. Izwi rokuti "mapuroteni" kutsanangura mamorekuru aya akanga akakurudzira kubudikidza Mulder kuti shamwari; mapuroteni rinobva muchiGiriki shoko πρώτειος (proteios), zvichireva "wokutanga", "mu mutobvu", kana "kumira pamberi", + -in. Mulder akapfuurira kuziva mapuroteni kuparara zvigadzirwa sezvo shoma amino asidhi leucine nokuti akanga achidavira rinokosha (nearly 131 mamorekuru uremu).
Berzelius