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The most abundant residues and coordination geometries (signature) of each metal.
| Metal | Dominant residue(s) | Dominant geometry |
|---|---|---|
| Zn | Cys, His | Tetrahedral |
| Cd | Glu (Asp) | Diverse |
| Mn | Asp (Glu, His) | Octahedral |
| Fe2+ | His, Glu | Octahedral |
| Fe3+ | His (Glu) | Octahedral |
| Co | His (Asp, Glu) | Octahedral |
| Ni | His | Octahedral |
| Cu | His | Trigonal plane |
Residues in parentheses are highly represented but not the most abundant residues.
