Of 7Fe ferredoxin

Figure 5 Voltammograms of solutions of 7Fe ferredoxins at a PGE electrode (A) Azo-tobacter vinelandii, (B) Sulfolobus acidocaldarius. In each case, proteins are 80 pM in 20 mM Mes, 0.1 M NaCl, 2mM neomycin, 0.1 mM EOT A, pH 6.4. Scan rate 5 mV s", temperature 0°C.

Figure 6 Cyclic voltammograms of 7Fe ferredoxins immobilized at aPGE electrode with polymyxin as co-adsorbate, pH 7.6, temperature 0°C. Conditions (not optimized to reveal couples in clearest detail) are as follows. Top Azotobacter vinelandii Fdl scan rate 100 mV s Center Desulfovibrio qfricanus Fdlll scan rate 10 mV s Bottom Sulfolobus acido-calarius Fd scan rate 100 mV s. For A.v. Fdl, signals B interfere significantly with C at this scan rate. (Reproduced with permission from J. Am. Chem. Soc. 1996,118, 8593-8603. Copyright 1996 American Chemical Society).

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