Table 1.
Gene IDs for claudin genes in commonly studied mammals
| Gene | Human | Chimpanzee | Rat | Mouse |
| CLDN1 | 9076 | 12738 | 65129 | 12737 |
| CLDN2 | 9075 | 465795 | 300920 | 12738 |
| CLDN3 | 1365 | 742734 | 65130 | 12739 |
| CLDN4 | 1364 | 463464 | 304407 | 12740 |
| CLDN5 | 7122 | 458955 | 65131 | 12741 |
| CLDN6 | 9074 | 467882 | 287098 | 54419 |
| CLDN7 | 1366 | 455232 | 65132 | 53624 |
| CLDN8 | 9073 | 474085 | 304124 | 54420 |
| CLDN9 | 9080 | + | 287099 | 56863 |
| CLDN10 | 9071 | 452626 | 290485 | 58187 |
| CLDN11 | 5010 | 460846 | 84588 | 18417 |
| CLDN12 | 9069 | 463521 | 500000 | 64945 |
| CLDN13 | - | - | + | 57255 |
| CLDN14 | 23562 | 470085 | 304073 | 56173 |
| CLDN15 | 24146 | 463619 | 304388 | 60363 |
| CLDN16 | 10686 | 740268 | 155268 | 114141 |
| CLDN17 | 26285 | 474084 | 304125 | 239931 |
| CLDN18 | 51208 | 470935 | 315953 | 56492 |
| CLDN19 | 149461 | 747192 | 298487 | 242653 |
| CLDN20 | 49861 | 472215 | 680178 | 621628 |
| CLDN21 | 644672 | 740287 | + | 100042785 |
| CLDN22 | 53842 | 743556 | 306454 | 75677 |
| CLDN23 | 137075 | 472693 | 290789 | 71908 |
| CLDN24 | 100132463 | 471363 | 100039801 | 502083 |
The GenBank gene ID is given when the CLDN gene is present in the given species. A dash (-) represents the absence of a particular CLDN homolog in the particular species whereas a plus sign (+) signifies that the gene seems to be present in the genome, although it is not yet annotated and assigned a gene ID in GenBank.