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The bchH gene of Rhodobacter capsulatus has been cloned into an expression strain of Escherichia coli. Following induction of expression of the BchH protein, it was found that the E. coli strain also accumulated porphyrins with the fluorescence properties of protoporphyrin and zinc protoporphyrin. It was also found that the soluble BchH protein increased the activity of S-adenosyl-l-methionine:magnesium...
The addition in trans of the pufQ gene to a strain of Rhodobacter capsulatus from which the entire puf operon had been deleted, increased its ability to synthesize coproporphyrinogen from both δ-aminolevulinic acid and porphobilinogen. Studies at the enzyme level indicated that the conversion of porphobilinogen to uroporphyrinogen III had about a 2-fold higher level of activity in the anaerobically-grown...
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