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Ferredoxin from the hyperthermophile Thermotoga maritima is stable beyond the boiling point of water.

Pfeil, W. ; Gesierich, U. ; Kleemann, G. R. ; Sterner, Reinhard


Heat-stable proteins from hyperthermophilic microorganisms are ideally suited for investigating protein stability and evolution. We measured with differential scanning calorimetry and optical absorption spectroscopy the thermal stability of [4Fe-4S] ferredoxin from Thermotoga maritima (tfdx), which is a small electron transfer protein. The results are consistent with two-state unfolding at the ...


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