FIGURE 3.

Ribbon representation of fRMsr from N. meningitidis in complex with l-Met-R-O. The two subunits are in white and yellow. The flap of the subunit A is in red. The side chains of Cys¹¹⁸ and Cys⁸⁴ are shown in stick representations and colored in green. The l-Met-R-O is represented in a stick representation with the carbon atoms in purple, the oxygen atoms in red, the nitrogen in blue, and sulfur atoms in yellow. The side chains of Arg⁹¹, Asp¹¹⁴, Phe⁶¹, and Trp⁶² are represented in sticks colored yellow for the carbon atoms, red for oxygen atoms, and blue for nitrogen atoms.