Artificial Metalloproteins Containing Co4O4 Cubane Active Sites 2018 February Artificial Metalloproteins Containing Co4O4 Cubane Active Sites Journal of the American Chemical Society Olshansky, L.; Huerta-Lavorie, R.; Nguyen, A. I.; Vallapurackal, J.; Furst, A.; Tilley, T. D.; Borovik, A. S.