ON STEROLS IN BACTERIA

Abstract
Micromonospora sp., Streptomyces griseus, Sphaerotilus natans, and Rhodospirillum rubrum were tested for the presence of sterols after growth on appropriate chemically-defined media. S. natans and S. griseus yielded negative results in tests that could detect as little as 0.00001% of the wet weight as sterol. The others contained traces of sterol.