ANOTHER BACTERIOPHAGE. “The M13 bacteriophage (Phage) is composed of 2, 700 copies of the helically arranged pVIII major coat protein on its body. Five to seven copies each of pIII, pVI, pIX, and pVII are located at each end of the M13 phage. It is a virus nanofiber of approximately 880 nm in length and 6.6 nm in diameter and is safe in humans.”
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