Growth of fractal aggregates in water solutions of macromolecules by light scattering

We present experimental results showing that such macromolecules as bovine serum albumin (BSA) and deoxyribonucleic acid (DNA) in water solutions build aggregates of fractal structure. We use light scattering techniques, including dynamic (light-beating spectroscopy) and static (intensity) measurements. The BSA results show a behavior similar to that of polystyrene solutions, while for DNA we have observed a restructuring process analogous to those occurring in colloidal silica and gold aggregates.