Summary: The walls of two strains of (flocculent and non-flocculent) were isolated from exponential and stationary phase cells after growth in media of different Ca and K composition. Flocculation of the walls was identical to that of intact cells. The transition from the non-flocculent to the flocculent state involved alterations of the polysaccharide, protein and mineral (Ca and K) composition of the walls. The walls of flocculent cells had a higher mannose/glucose molar ratio, a lower percentage of protein, a lower percentage of Ca and a higher percentage of K.


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