The nitrogen cycle

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  • Ammonia (NH3)
    • Nitrogen in the atmosphere (N2)
      • Nitrate
    • Nitrite
      • Nitrate
      • then forming nitrate ions (NHO-2-> NO3)
      • Animal protein
        • Plant protein
        • Plant protein
        • Nitrification
          • Nitrifying bacteria can oxidise ammonia to nitrate in 2 stages
            • First forming nitrite ions (NH+4-> NHO-2)
              • Nitrite
                • then forming nitrate ions (NHO-2-> NO3)
            • Ammonia (NH3)
              • Nitrogen in the atmosphere (N2)
                • Animal protein
              • Microbial saprobionts break down proteins using extracellular protease enzymes
                • They remove the amino groups from amino acids using deaminase enzymes from ammonia
                • Ammonification

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