Components
of
RNA
Polymerases
of
Escherichia
Coli
and
Bacillus
Subtilis -
| Subunit | Molecular Weight | Function | |
| E.coli | B.subtilis | ||
| β' (beta') | 160,000 | 160,000 | Binding of RNA polymerase of DNA |
| β (beta) | 150,000 | 150,000 | Binding with sigma factor |
| α (alpha) (2) | 40,000 | 45,000 | Promoter recongnition (?) |
| δ (delta) | -- | 21,000 | -- |
| ω1 ( omega 1 ) | -- | 11,000 | Not essential for normal activity |
| ω2 ( omega 2 ) | -- | 9,500 | Not essential for normal activity |
| σ sigma | 90,000 | 55,000 | Recognition of start signals (initiation) |