First human brain chemicals, 1865-1871 :The Scientist [2009-07-01]


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	By Elie Dolgin

First human brain chemicals, 1865-1871 In 1864, the German pharmacologist Oscar Liebrich presented a paper at a meeting in Giessen arguing that brain tissue was composed of a single giant molecule called "protagon." Any simpler lipids that chemists were isolating, Liebrich argued, were simply breakdown products of this primary, high-molecular-weight compound.