ProtoKinetix to Trade Under its New Symbol: PKTX; Change to be effective at the open of trading, Monday, August 4, 2003 VANCOUVER, British Columbia, Aug. 1, 2003 (PRIMEZONE) -- ProtoKinetix, Incorporated (OTCBB:RJVN) (OTCBB:PKTX) announced today that, as of the opening bell, Monday, August 4, 2003, it will trade on...