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Tetrapyrrole

    Tetrapyrroles are compounds with four pyrrole rings that are interconnected through one-carbon methine bridges. They can either be in connected via linear fashion or a cyclic fashion.
    Linear tretrapyrroles include:
    • Bilane
    • Phycobilins (found in Cyanobacteria)

    Cyclic tetrapyrroles include:
    • Porphyrins (e.g. heme)
    • Chlorophylls