circular dichroism near uv https://www.creative-proteomics.com/pronalyse/circular-dichroism-spectroscopy-near-uv.html Circular dichroism (CD) spectroscopy is used to measure differences in the absorption of left-handed polarized light versus right-handed polarized light arise because of structural asymmetry. An ordered structure results in a spectrum containing both positive and negative signals while the absence of regular structure results in zero CD intensity.