318 



ELECTRON TRANSPORT 



300 400 500 600 700 

 WAVELENGTH imp) 



Fig. 1, Absorption spectra of oxidized and reduced 

 Chromatin}}} iron protein. The sample cuvette con- 

 tained 0.34 mg/ml oxidized iron protein in 50 mM 

 phosphate buffer, pH 7. Approximately 1 mg mer- 

 captoethanol was added to reduce the protein. 



