Multiple choice

Pepsin is an enzyme found in humans. It was first crystallized by

  1. Theodor Schwann

  2. Louis Pasteur

  3. Robert Koch

  4. Paul Ehrlich

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A Correct answer
Explanation

He was a German physiologist. He is famed for the development of cell theory, the discovery of Schwann cells in the peripheral nervous system, and the discovery and study of pepsin.