FIGURE 3.

Spectra of c₅₅₂ and c₅₅₄ cytochromes enzymatically reduced by purified Aro. Oxidized cyts (black lines) were incubated for 3 min with the enzyme (dotted lines); c₅₅₂ (A) and c₅₅₄ (B). Insets show the α-bands of cytochrome c₅₅₂ and c₅₅₄ absorbing at 552 and 554 nm, respectively.