Figure 6From: Identification of the para-nitrophenol catabolic pathway, and characterization of three enzymes involved in the hydroquinone pathway, in pseudomonas sp. 1-7Enzyme activity assay of PdcDE. (a) Absorbance readings from 250 nm to 320 nm in the absence of His6-PdcDE; (b) Spectral changes during rapid oxidation of HQ by purified His6-PdcDE. The spectra were recorded a total of five times over a five minute period (marked 1-5). The arrows indicate the direction of spectral changes.Back to article page