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Transmission electron micrographs of M. jannaschii PAN. The arrowhead in panel A indicates side view in which PAN resembles a comma-shaped complex. The arrowhead in panel B points to a more face-on view in which the head of the comma is at top. Distinct individual subunits are seen as white globular components of each assembly. Larger clusters probably represent random associations created when sample was dried for transmission electron microscopy observation. Bars, 10 nm.
