many investors in ventures have specific non-dilution clauses that are activated when new money is raised.

PTSC's investment trigerred a right for prior investors to retain a level of ownership.

Likewise certain investors wish to see management invest capital and the PTSC Talis agreement might have included this clause - although not likely since it would have been noted in teh first release - most likely the former scenario that upon closing Talis contacted prior investors and some or all exercised an anti-dilutuion right.