Labeled and annotated multiple sequence alignment of COQ4. Amino acid sequences of COQ4 were analyzed as described in Materials and Methods and include Homo sapiens (NCBI accession number NP_057119.3) and homologs in Saccharomyces cerevisiae (NP_010490.1), Drosophila melanogaster (NP_730270.1), Danio rerio (NP_001108192.1), Mus musculus (NP_848808.1), Schizosaccharomyces pombe (NP_593130.1), Aspergillus puulaauensis (XP_041555109.1), and Marasmius oreades (XP_043005754.1). See KEY for descriptions of the figure annotations. The metal ligand motif is boxed in cyan, and putative residues that ligand the metal ions are denoted by a blue dot, data from [47].