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EMs of phage N1M2. (A) Empty phage capsid (black arrow), broken phage tail (white arrow), and fully formed phage particle (black triangle). (B) Contracted tail sheath (white arrow) with tail core (black arrow). (C) Phage N1M2 with uncontracted tail. (D) Baseplate (black arrow) and neck structure (white arrow) of uncontracted tail.
