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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Phys Life Rev. 2012 Jun 13;9(3):219–263. doi: 10.1016/j.plrev.2012.06.001

Figure 20. Schematic of possible replication cycles in a replicator system with or without DNA-like replicators.

Figure 20

RdRp denotes the RNA-dependent RNA polymerase (RNA replicase); DdRp, the DNA-dependent RNA polymerase (transcriptase); DdDp, the DNA-dependent DNA polymerase (DNA replicase); RdDp, the RNA-dependent DNA polymerase (reverse transcriptase); dual-Rp, the RNA polymerase that recognizes both RNA and DNA as templates; dual-Dp, the DNA polymerase that recognizes both RNA and DNA as templates. Superscripts indicate whether molecules are RNA or DNA.