The Optima AUC can be fitted with both or either an absorbance module (ABS) to monitor biomolecules that have absorptive signatures between 170 and 800 nm, and a Rayleigh Interference module (INT) to monitor sedimentation differences between the sample and reference solutions. This allows for the characterization of particles made up of proteins and nucleic acids and those without absorptive properties such as carbohydrates and lipids. To learn more about analytical ultracentrifugation, visit the dedicated section.