Abstract
Biophysics Careful measurements of light scattering can provide information on individual macromolecules and complexes. Young et al. used a light-scattering approach for accurate mass determination of proteins as small as 20 kDa (see the Perspective by Lee and Klenerman). Movies of protein complex association and dissociation were analyzed to extract biophysical parameters from single molecules and assemblies without labeling. Using this approach, the authors determined in vitro kinetics of fibril and aggregate growth and association constants for a complex protein-glycoprotein assembly. Science , this issue p. [423][1]; see also p. [378][2] [1]: /lookup/doi/10.1126/science.aar5839 [2]: /lookup/doi/10.1126/science.aat5851
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