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. 2016 May 27;13:71–76. doi: 10.2142/biophysico.13.0_71

Table 1.

Summary of in-vivo studies estimating electron flux per single deca-heme in OM c-Cyt complex

Cell conditions Electron flux per cell Deca-heme c-Cyt content per cell a Rate constant (s−1) per deca-heme c-Cyt Electron Acceptor Potential vs SHE Method Ref.
Single cell (PV-4) 1.2×106 ~300 b ITO electrode 0.4 In vivo electrochemistry [2]
Single cell (MR-1) 1.3×106 ~330 b Carbon electrode n.a. In vivo electrochemistry [9]
Chemostat culture (MR-1) 2.6×106 oxygen +0.81 O2 sensor [31]
Anaerobic culture (MR-1) 90000~150000 ferric citrate d Western blot [29]
0.25±0.04 c α-FeOOH −0.157 Ferrozine assay [29]
Anaerobic culture (MR-1) 4000 Fe3+, d UV-vis Absorption [32]
Single cell (MR-1) 4000~7000 e Fe2O3 d Antibody AFM [11]
Biofilm on electrode (MR-1) 1.8×105 4900 e ~37 ITO electrode +0.4 In vivo electrochemistry [10]
Biofilm on electrode (PV-4) 1.2×105 6000 e ~20 ITO electrode +0.4 In vivo electrochemistry [12]
a

Assumed the size of a bacteiral cell, a rod-shaped bacterium that is 0.5 by 2.0 μm.

b

Assumed deca-heme c-Cyt content is 4000.

c

Average of MtrC and OmcA estimated based on the assumption of Michaelis-Menten constant Km=0.2 M.

d

Electron acceptors used for the growth of cells before quantifying OmcA or MtrC.

e

The number of deca-heme c-Cyts at bacteira/electrode interface.