Abstract
SUMMARY: The amino acid and peptide content of the micrococci as revealed by paper chromatography depended on the physiological age of the culture and on the composition of the growth medium. The use of different peptones in a Yeastrel glucose peptone medium resulted in minor changes in the chromatograms. A greater effect was noted when glucose was omitted. When the composition of the growth medium was standardized the best comparison of cultures was afforded by the preparation of chromatograms from samples taken in the late logarithmic and early stationary phases of growth.
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