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Electron micrographs of phage CBB with black arrows indicating baseplate fibers, open arrows indicating hair-like appendages (whiskers) and triangles indicating neck passage structure. (A,B,E) CBB virion base plate tail fibers are indicated. (B–D) Fully intact virions with atypical whisker-like structures on the contractile tail surface. (E) CBB virion contractile tail missing a capsid. (F) CBB virion with contracted tail.
