| Protein | Selected examples of fish species | Reference |
| ) Antigen presenting surface markers and MHC molecules | CD80 (B7.1) | Zebrafish, rainbow trout | [44, 159] | CD83 (7.2) | Zebrafish, turbot, Atlantic salmon | [44, 159–161] | CD86 | Zebrafish, rainbow trout | [44, 159] | CD209 | Zebrafish | [162] | MHC-I | Orange spotted grouper, sea bass, grass carp | [49, 163, 164] | MHC-II | Zebrafish, lake trout, | [159, 165] |
| () T-cell receptors, costimulatory and activator molecules | CD3 | Atlantic salmon | [166] | CD3 | Atlantic salmon | [166] | CD3 | Atlantic salmon | [166, 167] | CD3 | Rainbow trout, Atlantic salmon | [166, 168, 169] | TCR | Rainbow trout and Japanese flounder | [170, 171] | TCR | Rainbow trout and Japanese flounder | [170, 171] | TCR | Japanese flounder | [171] | TCR | Japanese flounder | [171] | CD28 | Rainbow trout | [47, 48] | CTLA | Rainbow trout | [47, 48] | CD40L | Atlantic salmon and Japanese flounder | [65, 172] |
| () T-cells | CD8α | Rainbow trout, Atlantic salmon | [51, 143, 173] | CD8β | Atlantic salmon, Atlantic salmon | [143, 169] | CD4 | Atlantic salmon | [169] |
| () Immunoglobulins | IgM | Atlantic salmon, rainbow trout | [56, 174, 175] | IgD | Atlantic salmon, rainbow trout | [59, 174] | IgT | Rainbow trout, Atlantic salmon | [58, 62] | IgZ | Zebrafish | [176] |
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