Cytochromes of Rhizobium japonicum 61A76 Bacteroids from Soybean Nodules.
Bacteroids of Rhizobium japonicum 61A76 were isolated from nodules of field-grown soybean plants by sucrose density gradient fractionation. The major cytochromes, aa(3), b, c, and possibly o were present in the bacteroids throughout the active nitrogen-fixing life of the nodule. This is in contrast with previous reports using other R. japonicum strains in which cyotchromes aa(3) and o were not found.
Keister
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Charles F. Kettering Research Laboratory, Yellow Springs, Ohio 45387.
Marsh
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El Mokadem
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