Table 4. The C-terminal amino acids of the OmpB orthologs and putative analogs show porin characters.
| C-terminal amino acids (N → C) | ||||||||||
| Protein | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| TM0476 | Y | L | Y | L | K | A | S | V | A | F |
| TRQ2_0459 | F | G | F | I | T | Y | R | L | A | F |
| Tpet_0444 | Y | L | Y | L | K | A | S | V | A | F |
| Tnap_0258 | Y | L | Y | L | K | A | S | V | A | F |
| CTN_0196 | Y | L | Y | L | K | A | E | V | E | F |
| Tmel_0175 | Y | A | K | L | S | W | S | V | S | F |
| Fnod_1725 | N | L | K | L | T | Y | S | A | S | F |
| Kole_1501 | Y | A | Y | V | G | Y | Y | A | A | F |
| Theba_0319 | S | L | G | L | Y | F | D | K | Y | F |
| Pmob_0056 | Y | L | Y | L | K | A | E | F | K | F |
| Tlet_1718 | T | L | A | W | R | M | R | V | Y | F |
| THA_406 | T | L | N | M | N | A | H | F | D | F |
Position 1 indicates the C-terminal amino acid. Hydrophobic residues are boldface. All porins shown possess the essential terminal phenylalanine and most have hydrophobic residues at positions 3, 5, 7 and 9. ORFs above the line are homologs of TM0476, those below the line are possible analogs of TM0476.