Fig. 3: Crystal structures of the selected MCOs.

a The crystal structures of Bfre and Sulfur, including their active centers. b Superimposition of Sulfur (PDB: 8Z59, colored in orange) with Eclac (AF-P36649-F1-model_v4, colored in cyan). The loop region of Ile335–Val340 (Sulfur) and Asp333–Ala384 (Eclac) are highlighted with B-factors of the regions represented as thickness. Source data are provided as a Source Data file.