“Virtually every chemical reaction in a cell occurs at a significant rate only because of the presence of enzymes.”

—  Albert L. Lehninger

Principles of Biochemistry, Ch. 1 : The Foundations of Biochemistry

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Albert L. Lehninger19
American biochemist 1917–1986

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“It is not necessary that a specific set of 2000 enzymes be assembled… Whenever a collection of chemicals contains enough different kinds of molecules, a metabolism will crystallize from the broth.”

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