- Histidine 129 in the 75-kDa subunit of mitochondrial complex I from Yarrowia lipolytica is not a ligand for [Fe4S4] cluster N5 but is required for catalytic activity. Waletko, A., Zwicker, K., Abdrakhmanova, A., Zickermann, V., Brandt, U., Kerscher, S. J. Biol. Chem. (2005)