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Mulder discovers proteins; Berzelius names them

When
1838
Where
Laboratory context; Swedish Academy context; Publication context
Episodes
3

Gerardus Johannes Mulder identified protein substances through elemental analysis, finding a consistent empirical formula. Jöns Jacob Berzelius, a Swedish chemist, coined the term 'protein' in 1838, derived from Greek for 'of the first rank', reflecting its fundamental biological importance.

Episodes

  1. 1838 · Laboratory contextMulder's Empirical Formula

    Mulder analyzed common proteins and found they shared the same empirical formula, leading to a hypothesis about their molecular structure.

  2. 1838 · Swedish Academy contextBerzelius Coins the Term

    Berzelius coined the term 'protein' in 1838, derived from Greek, to reflect the fundamental nature of these substances.

  3. 1838 · Publication contextMulder Uses the Term

    Following Berzelius's suggestion, Mulder used the term 'protein' in his 1838 paper on animal substances.

Background and detail

Background. Jöns Jacob Berzelius was a Swedish chemist recognized as a founder of modern chemistry. He advised Gerardus Johannes Mulder on elemental analyses of organic compounds. Mulder, a Dutch chemist, conducted these analyses, observing that proteins shared a common empirical formula, leading to the hypothesis that they were composed of a single large molecule type.

Mulder's Analysis. Mulder performed elemental analysis on common proteins and determined that nearly all possessed the same empirical formula, C400H620N100O120P1S1. This observation led him to the erroneous conclusion that proteins might be composed of a single type of very large molecule, a key step in the identification of these substances.

Berzelius's Naming. The term 'protein' was coined by Berzelius in 1838. It is derived from the Greek word 'proteios', meaning 'of the first rank' or 'primary'. Berzelius proposed this name because proteins were considered fundamental to living organisms, reflecting their essential biological roles.

People involved

Sources

  1. Protein Wikipedia, revision of 2026-10-03
  2. Jöns Jacob Berzelius Wikipedia, revision of 2026-09-25
  3. Gerardus Johannes Mulder Wikipedia, revision of 2026-09-01

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.