C-X-C motif chemokine 13 (CXCL13) is a 109-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: O43927.
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The mean pLDDT of this model is 83.9 (confident overall). pLDDT is AlphaFold's per-residue confidence score from 0 to 100. In MolViewer, choose the B-factor color scheme to color the model by pLDDT, because AlphaFold stores it in the B-factor column.
| pLDDT band | Meaning | Share of residues |
|---|---|---|
| Above 90 | Very high: backbone and side chains are usually accurate | 50% |
| 70 to 90 | Confident: backbone generally right | 29% |
| 50 to 70 | Low: treat with caution | 21% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Chemotactic for B-lymphocytes but not for T-lymphocytes, monocytes and neutrophils. Does not induce calcium release in B-lymphocytes. Binds to BLR1/CXCR5
Secreted
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7JNY | X-ray | 1.88 Å | A=23-109 |
| 5CBE | X-ray | 2.4 Å | E/F=23-109 |
| 5CBA | X-ray | 2.5 Å | E/F=23-109 |
| 6VGJ | X-ray | 2.52 Å | A/B/C/D/E/F/G=24-109 |
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