Occurrence and Filterability of Protoplast-like Elements in Aged Bacterial Cultures

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CELLULAR or subcellular units of certain bacteria that have been deprived of a rigid cell wall have been regarded in the recent literature as protoplasts. The conversion of rods into spherical protoplasts was observed mostly in media containing penicillin and magnesium ions plus sucrose as stabilizers1, although Jeynes2 has reported their natural occurrence.

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SINKOVICS, J. Occurrence and Filterability of Protoplast-like Elements in Aged Bacterial Cultures. Nature 181, 566–567 (1958) doi:10.1038/181566b0

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