FIGURE 1. Electron microscopy and fluorescence light microscopy of the 'Nanoarchaeum equitans'–Ignicoccus sp. coculture.
From the following article:
A new phylum of Archaea represented by a nanosized hyperthermophilic symbiont
Harald Huber, Michael J. Hohn, Reinhard Rachel, Tanja Fuchs, Verena C. Wimmer and Karl O. Stetter
Nature 417, 63-67(2 May 2002)
doi:10.1038/417063a
a, Freeze-etched cell of Ignicoccus and four attached cells of 'Nanoarchaeum', showing their crystalline S-layer with sixfold symmetry. b, Ultrathin section of two cells of 'Nanoarchaeum' attached to the outer membrane of Ignicoccus. c, Cell of Ignicoccus, with several cells of 'Nanoarchaeum' attached on the left side; platinum-shadowed. d, Confocal laser scanning micrograph after hybridization with the CY3-labelled probe 515mcR ('Nanoarchaeum') and rhodamine-green-labelled probe CREN499R (Ignicoccus). a–d, Scale bar, 1.0 
m.
