Fold: DNA/RNA polymerases

Lineage:

1. Root: scop
2. Class: Multi-domain proteins (alpha and beta)
   Folds consisting of two or more domains belonging to different classes
3. Fold: DNA/RNA polymerases

Superfamilies:

1. DNA/RNA polymerases (4)
   "palm" domain has a ferredoxin-like fold, related to that of an adenylyl cyclase domain
   1. DNA polymerase I (9)
   2. Reverse transcriptase (2)
   3. T7 RNA polymerase (1)
   4. RNA-dependent RNA-polymerase (2)