4J20:
reference: Structure analysis and characterization of the cytochrome c-554 from thermophilic green sulfur photosynthetic bacterium Chlorobaculum tepidum., Yu LJ, Unno M, Kimura Y, Yanagimoto K, Oh-Oka H, Wang-Otomo ZY, Photosynth Res. 2013 Sep 20. PMID: 24052268

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