Jean Rivier was a chemist both in training and spirit, but by isolating and characterizing many then-undiscovered peptide hormones, and providing the synthetic peptide tools critical to experimental biology to study them, he became a pioneer of our modern understanding of the biological roles of peptides in regulating nearly all physiologic systems ranging from endocrinology... Jean Rivier was a chemist both in training and spirit, but by isolating and characterizing many then-undiscovered peptide hormones, and providing the synthetic peptide tools critical to experimental biology to study them, he became a pioneer of our modern understanding of the biological roles of peptides in regulating nearly all physiologic systems ranging from endocrinology...