Vaccine company Powderject Pharmaceuticals is selling some rights to its painless injection system as part of a plan to transform itself into the world's leading pure vaccine company.

Powderject, based at Oxford Science Park, was set up to develop a needle-free drug-delivery device invented by Oxford Professor Brian Bellhouse.

It moved into making the drugs and vaccinations in powder form for use in the device. Last year it became the UK's biggest vaccines company when it bought Mer- seyside-based Evans Vaccines from biotech giant Celltech.

The group put up for sale its lead drug, a powder form of the local anaesthetic lidocaine, and licences for using its technology of blasting drug particles into the skin.