Neutron scattering experiments have been shown to provide useful information about the properties subcellular structures. Two experimental examples carried out by our group are briefly reviewed. One is the structure determination of the HU protein-DNA complex. HU protein plays a role not only packing long DNA but also affecting transcription and replication of active DNA. Our results indicate that HU protein might bend DNA in a cell. The other is the observation of the crystallization process of lysozyme from the microscopic molecular level. We found that the pre-crystallization process started even in the unsaturated solutions.
