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Sigma factor vs DNA-directed RNA pol

| posted 04 Feb, 2019 14:12
Some cluster A phages contain a sigma factor that is mislabeled as "DNA directed RNA polymerase". This is due to a misinterpretation of a PDB crystal structure comprised of a complex of proteins. The gene in question aligns to the sigma factor in the complex, not the RNA pol.
At this time, no cluster A phages contain a verifiable RNA polymerase.
| posted 16 Jun, 2023 14:30
If you are unsure of how to call the sigma factor, we recommend not calling it as such, instead use DNA binding protein.
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