Ferredoxin: an iron-containing protein present in green plants and certain anaerobic bacteria that functions in electron transport reactions in biochemical processes such as photosynthesis.
In return, the bacteria find themselves in an anaerobic environment where they receive a steady flow of protein-rich food that enables them to thrive.
作为回报，这些细菌也得到了一个厌氧环境，这个环境可以提供稳定丰富的蛋白质来源，菌类也得以繁衍生息。
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By using SDS-PAGE technique the soluble protein antigen of anaerobic bacteroides fragilis were studied. The results show three kinds of protein zone among the strains species.