Fig. 5: Protonation states observed for His30 and Tyr166 among the different chains of Mn2+SOD and Mn3+SOD. | Nature Communications

Fig. 5: Protonation states observed for His30 and Tyr166 among the different chains of Mn2+SOD and Mn3+SOD.

From: Direct detection of coupled proton and electron transfers in human manganese superoxide dismutase

Fig. 5

a, b Neutron structures at the His30-Tyr166 interface of Mn2+SOD. c, d Neutron structures at the His30-Tyr166 interface of Mn3+SOD. The inset of a indicates chain identity. Light blue 2|Fo|−|Fc| neutron scattering length density is displayed at 1.0σ. Purple-blue, orange, and green omit |Fo|−|Fc| difference densities are displayed at contours of 4.0σ, 3.0σ, and 2.5σ, respectively. e Overall interpretation for a proton shuttle involving Tyr166 and His30. Numbers are distances in Å.

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