# Nitrogen metabolism - Reference pathway

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- Pathway modules
  - Energy metabolism
    - Nitrogen metabolism
      - M00175 Nitrogen fixation
      - M00531 Assimilatory nitrate reduction
      - M00530 Dissimilatory nitrate reduction
      - M00529 Denitrification
      - M00528 Nitrification
      - M00804 Complete nitrification, comammox