1887

Abstract

SUMMARY: An osmotic barrier, impermeable to inorganic phosphate ions, is present near the external surface of var. (strain Duncan). The barrier encloses a volume of 1·66 ±0·07 ml./g. dry-wt. cells, within which the inorganic phosphate of the cell is confined at a concentration of 0·1 m. The inorganic phosphate of the internal and external media exhibit a rapid reciprocal exchange, sensitive to traces of heavy metals. The existence of the osmotic barrier and the characteristics of the phosphate exchange are not in accord with an exchange-adsorption hypothesis; they are in accord with an exchange-diffusion hypothesis, according to which phosphate is shuttled across the osmotic barrier by carrier molecules. There is no experimental justification for supposing the acid-soluble inorganic phosphate of to exist as an acid-labile compound.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-9-2-273
1953-10-01
2019-12-12
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-9-2-273
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error