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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Virology. 2015 Feb 27;0:650–656. doi: 10.1016/j.virol.2015.01.015

Fig. 5.

Fig. 5

Substrate and motor dimensions and dynamics by FRET: (A) Increased FRET between stalled Y-stem DNA dye pairs supports B to A form compression; the gp49:Endonuclease VII X- or Y-resolvase decreases the Y-stem DNA FRET and allows completion of packaging. In the stalled anchored Y DNA the terminase moves toward the portal as judged by FRET increase between dye labeled terminase and (B) C-terminal GFP labeled gp20 portal containing proheads, and (C) N-terminal GFP labeled gp20 portal containing proheads that allow determination of the docking orientation in the two component prohead packaging motor.