This paper argues that there is a substantial overlap between the history of immunology and the history of molecular biology, an overlap manifested in the researches on antibodies during the 1930s and 1940s. This common ground is a product of intellectual developments, as well as institutional trends. Viewed from an intellectual vantage point of the 1930s and 1940s, molecular biology was essent...

Streptococcal mucopeptide, solubilized by either ultrasonic treatment or lysozyme, gave a precipitin reaction with rabbit antimucopeptide serum. A haptenic inhibitor of this reaction, which was composed of alanine, glutamic acid, and lysine in a mole ratio of 4:1:1, was isolated from a Streptomyces albus enzymes digest of Group D cell walls by ion exchange chromatography. When selected antisera...