Compositional maps of chromosomes. (A) DNA. (B) Protein. (C) Non-carbonaceous compounds. (D) Composite image. (E) Absorbance reference spectra of 1 nm of albumin and nucleic acid. The scale bars of (A) and (B) are in nanometers and (C) is in optical density. Two chromosomes are marked in red (1) and green (2) for comparison.
Yangquanwei et al. Nanoscale Research Letters 2013 8:463 doi:10.1186/1556-276X-8-463