Yan Chen, Sunil Naik, Jurek Krzystek, Sooim Shin, William Nelson, Shenghui Xue, Jenny Yang, Victor L. Davidson, and Aimin Liu, Role of Calcium in Metalloenzymes: Effects of Ca2+ Removal on the Axial Ligation Geometry and Magnetic Properties of the Catalytic Diheme Center in MauG, Biochemistry (2012). 28; 51(8):1586-97. Feb 8. [Epub ahead of print], PMID: 22320333.