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Ultrastructures of phages PH15 (A to C) and CNPH82 (D to F). (A and D) Transmission electron micrographs of phages PH15 and CNPH82, showing their isometric heads and noncontractile tails. (B and E) Tails of PH15 and CNPH82 detached from the virion head, showing the attached collar (arrowheads) and dual disc plates (arrows). (C and F) Single intact phage virions of PH15 and CNPH82. The collar is marked by arrowheads. Bars, 100 nm.
