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. 2011 Feb 15;9(2):e1000592. doi: 10.1371/journal.pbio.1000592

Figure 5. Single mature-phage-head-assembled packaging machines refill the capsid.

Figure 5

(A) The dual optical trap set-up for single molecule DNA packaging. The T4 head–motor complex and the 10-kb DNA substrate were tethered between two beads, each held in an optical trap and held under 5 pN tension. See Materials and Methods for details. (B–D) Packaging traces showing the packaging of DNA by proheads (B), partial heads (C), and full heads (DI–DIII). “n” represents the number of packaging traces qualitatively showing similar packaging behavior in that panel.