div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Ligands and electrons and haem proteins src=https:reader031fdocumentsusreader031viewer2022020523575069171a28ab0f07b3367bhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1996 Nature Publishing Group http:wwwnaturecomnsmbpdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Ligands and electrons and haem proteins src=https:reader031fdocumentsusreader031viewer2022020523575069171a28ab0f07b3367bhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divp© 1996 Nature Publishing Group http:wwwnaturecomnsmbpdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: Ligands and electrons and haem proteins src=https:reader031fdocumentsusreader031viewer2022020523575069171a28ab0f07b3367bhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divp© 1996 Nature Publishing Group http:wwwnaturecomnsmbp div class=annotation div class=annotationTitleanudiv div class=annotationContentsIMAGE UNAVAILABLE FOR COPYRIGHT REASONSdiv divdiv