Figure 1
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Figure 1. (A) Mimivirus (arrows) in
cytocentrifuged A. polyphaga as Gram-positive particles.
(B) Electronic microscopy of Mimivirus and
U. urealyticum. (C) Phylogenetic tree from
alignment of ribonucleotide reductase small subunit sequences (9).
Similar trees are obtained with ribonucleotide reductase large
subunits and topoisomerase 2.