T7 RNA Polymerase

T7 RNA Polymerase is a DNA dependent RNA polymerase that catalyzes the synthesis of RNA in the 5´→ 3´ direction only in the presence of its cognate T7 phage promoter sequence. T7 RNA Polymerase has high specificity for the T7 phage promoter and will not recognize SP6 or T3 RNA Polymerase promoter sequences.