text: Software packages such as CDSSTR, SELCON, and CONTIN can be used to analyze spectra produced by this technique.
full_question: Software packages such as CDSSTR, SELCON, and CONTIN can be used to analyze spectra produced by this technique. The Chirascan is a brand of spectrometer used for this technique. Spectrometers for this technique can be calibrated using pantolactone or 10-camphorsulfonic acid as standards. Calculation of data using this technique often involves multiplying delta- epsilon by 3298 to get theta. This technique produces prominent peaks in the far-UV range at 190, 208, and 222 nanometers. Measurements in this technique are often reported in terms of ellipticity. This technique works by measuring a molecule's difference in absorption between left-handed and right-handed circularly polarized light. For 10 points, name this technique commonly used to analyze the secondary structures of proteins.
first_sentence: Software packages such as CDSSTR, SELCON, and CONTIN can be used to analyze spectra produced by this technique.
raw_answer: circular dichroism [or CD]