Graeme Hardman from Nicholls and Clarke - the builders' merchants who have been producing the keysandlocks since day one - estimates that more than a million of the distinctive keys are in use.
If you find a key that changes basic functions of a cell and make substances that mimic these keysandlocks, interesting new drugs are sure to emerge, Fujino thought.
No-one bothers with locks: you could pretty much leave your wallet andkeys on the seat, return a couple of days later, and they'd be exactly where you'd left them.