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Mind Map on Untitled, created by Liv on 12/05/2013.
Liv
Mind Map by Liv, updated more than 1 year ago
Liv
Created by Liv over 11 years ago
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  1. Diazotrophs = N-fixing organisms
    1. ways to protect nitrogenase from O2
      1. Slime
        1. limit O2 diffusion
        2. high levels of resp.
          1. oxidise excessively to use up O2 inside cell
        3. heterocysts
          1. thick walled cells
            1. essential for long term stability of rice paddies
              1. bacteria produce NH3 - NO additional N
            2. nitrogenase enzyme
              1. fixes N
                1. needs lot of ATP
                  1. Fe-S-Mo (Fe-Mo-Co)
                    1. electron transfer
                    2. 1 N2 needs 8 electrons
                      1. inactivated by O2 = anaerobic
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