Reorientation of hydration water during the thermotropic main phase transition of 1-palmitoyl-2-oleolyl-sn-glycero-3-phosphocholine (POPC) bilayers at low degrees of hydration

- At low hydration, DSC scans of the main transition of POPC show complex profiles.
- Only the first DSC transition peak is mainly related to hydrocarbon chain melting.
- Water reorientation plays a major role in the main phase transition of POPC.