Abhängigkeit der Ausbildung bestimmter Antigene von Proteus mirabilis Stamm 1095/67 beim Wachstum auf Minimalnährmedien

Abstract

Proteus mirabilis strain 1095167'has been cultivated in surface culture on different minimal media, which were composed either of single amino acids or combinations of several amino acids without or with stepwise addition of other C-sources u p to the complete medium. We found a direct dependence of the formation of the various antigens (moving t o the cathode, to the anode, or not moving) on the composition of the medium.Certain amino acids (Ala, Glu, Asp, Ser) elicit only parts of the antigenic spectrum formed in complete medium, but enrich special antigens. With only 2 amino acids (Ala and Glu) and the vitamins thiamine, pyridoxal, and niacine in the anorganic basic medium the complete antigenic spectrum can be formed. We have shown that the composition of the cell wall varies with the composition of the culture medium.

Dietary Factors Influence Production of the Soy Isoflavone Metabolite S-(-)Equol in Healthy Adults

“…Bacteria responsible for conversion of daidzein to equol have been identified in only the last 10 y and, intriguingly, these are not the most abundant bacterial species that colonize the human gastrointestinal tract [reviewed in (1)]. Although historically, bacteria were considered able to synthesize all the macromolecules they needed, as early as 1975 vitamins essential to bacterial metabolism were recognized (51). More recently, instances of complex medium and vitamin supplementation have been reported as being essential to bacterial function (52)(53)(54).…”