Figure 2.

Topography, surface analysis, and section profile. (A) The topography was recorded in air using intermittent contact mode AFM. The topography exhibits a vertical brightness range of 300 nm. The chromatid appears divided by grooves in subunits corresponding to the units visible in SEM. The surface morphology corresponds to the SEM image. (B) Surface analysis of the quinoa chromosome by AFM. (C) Section profile of the chromosome along the line in (B).

Yangquanwei et al. Nanoscale Research Letters 2013 8:463   doi:10.1186/1556-276X-8-463
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