| Calcium-binding | Magnesium-binding | Iron-binding | Zinc-binding | ||||
---|---|---|---|---|---|---|---|---|
 | Kingdom or species | No. of proteins | Kingdom or species | No. of proteins | Kingdom or species | No. of proteins | Kingdom or species | No. of proteins |
Protein distribution in kingdom | Archaea | 73 | Archaea | 262 | Archaea | 381 | Archaea | 1048 |
 | Bacteria | 1092 | Bacteria | 2597 | Bacteria | 3743 | Bacteria | 6916 |
 | Eukaryota | 3897 | Eukaryota | 1081 | Eukaryota | 5248 | Eukaryota | 6464 |
 | Viridae | 343 | Viridae | 194 | Viridae | 29 | Viridae | 1466 |
Protein distribution in top 10 species | Homo sapiens | 651 | Homo sapiens | 140 | Arabidopsis thaliana | 278 | Homo sapiens | 1121 |
 | Mus musculus | 499 | Mus musculus | 129 | Escherichia coli | 214 | Mus musculus | 911 |
 | Rattus norvegicus | 305 | Arabidopsis thaliana | 117 | Homo sapiens | 191 | Rattus norvegicus | 382 |
 | Arabidopsis thaliana | 186 | Rattus norvegicus | 69 | Mus musculus | 185 | Saccharomyces cerevisiae | 380 |
 | Bos taurus | 142 | Escherichia coli | 63 | Rattus norvegicus | 152 | Arabidopsis thaliana | 359 |
 | Gallus gallus | 103 | Saccharomyces cerevisiae | 55 | Drosophila melanogaster | 124 | Caenorhabditis elegans | 255 |
 | Drosophila melanogaster | 94 | Bacillus subtilis | 53 | Methanococcus jannaschii | 92 | Drosophila melanogaster | 237 |
 | Oryctolagus cuniculus | 82 | Escherichia coli O157:H7 | 45 | Saccharomyces cerevisiae | 88 | Schizosaccharomyces pombe | 221 |
 | Sus scrofa | 65 | Salmonella typhimurium | 44 | Escherichia coli O157:H7 | 87 | Escherichia coli | 172 |
 | Caenorhabditis elegans | 64 | Schizosaccharomyces pombe | 43 | Bacillus subtilis | 77 | Methanococcus jannaschii | 119 |