William Howard Stein

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2026-06-23

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William Howard Stein (June 25, 1911 – February 2, 1980) was an American biochemist who collaborated in the determination of the ribonuclease sequence, as well as how its structure relates to catalytic activity, earning a Nobel Prize in Chemistry in 1972 for his work. Stein was also involved in the invention of the automatic amino acid analyzer, an advancement in chromatography that opened the door to modern methods of chromatography, such as liquid chromatography and gas chromatography.