Telomerase
Model of Telomerase as an RNA-Reverse Transcriptase Complex
See Lingner, J., Hughes, T. R., Shevchenko, A., Mann, M., Lundblad, V. and Cech, T. R. Reverse Transcriptase Motifs in the Catalytic Subunit of Telomerase. Science 276, 561-567 (1997) for details.