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| PR:000020965 | polymeric immunoglobulin receptor, signal peptide removed form | | |  | | |
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| PR:000050188 | polymeric immunoglobulin receptor secretory component | | |  | | |
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| PR:000050169 | polymeric immunoglobulin receptor secretory component (human) | | |  | | |
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| PR:000020966 | polymeric immunoglobulin receptor proteolytic cleavage product | | |  | | |
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| PR:000050188 | polymeric immunoglobulin receptor secretory component | | |  | | |
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| PR:000050169 | polymeric immunoglobulin receptor secretory component (human) | | |  | | |
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| PR:P01833 | polymeric immunoglobulin receptor (human) | | |  | | |
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| PR:000050169 | polymeric immunoglobulin receptor secretory component (human) | | |  | | |
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 |  |  |  |
    |
| PR:000020966 | polymeric immunoglobulin receptor proteolytic cleavage product | | |  | | |
 |  |  |  |  |
    |
| PR:000050188 | polymeric immunoglobulin receptor secretory component | | |  | | |
 |  |  |  |  |  |
    |
| PR:000050169 | polymeric immunoglobulin receptor secretory component (human) | | |  | | |
| |
| |
 |  |  |  |  |
    |
| PR:P01833 | polymeric immunoglobulin receptor (human) | | |  | | |
 |  |  |  |  |  |
    |
| PR:000050169 | polymeric immunoglobulin receptor secretory component (human) | | |  | | |