H-2 class II histocompatibility antigen, A-D beta chain (H2-Ab1) is a 265-residue protein from Mus musculus. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P01921.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 84.9 (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 | 60% |
| 70 to 90 | Confident: backbone generally right | 19% |
| 50 to 70 | Low: treat with caution | 17% |
| Below 50 | Very low: often disordered regions | 4% |
What pLDDT means and how to read it
Membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 2IAD | X-ray | 2.4 Å | B=20-216 |
| 1IAO | X-ray | 2.6 Å | B=27-216 |
| 7RDV | X-ray | 2.9 Å | B=31-216 |
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.