Mössbauer Spectroscopic Studies of Iron in Proteus mirabilis

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Abstract
Moessbauer measurements of P. mirabilis cells grown in 57Fe-enriched media show that considerable quantities of Fe are incorporated, particularly in the stationary phase of growth. A major part of the Fe is in a form which shows magnetically split spectra at low temperatures. Fractionation of cells reveals that Fe is present in both the soluble and particulate fractions, the larger proportion is found in the soluble fraction. The Fe in the particulate fraction is predominantly found in the outer membrane.