DELRAY BEACH, Fla., March 2, 2011 (GLOBE NEWSWIRE) -- PositiveID Corporation ("PositiveID" or the "Company") (Nasdaq:PSID) announced today that it has reached an important chemistry milestone in the development of its GlucoChip™, glucose-sensing RFID microchip. The Company has successfully shown that it is able to construct both anchor and reverse anchor building blocks and competitor constructs, which are able to bind with glucose, that can be incorporated into the sensor. These building blocks and competitor constructs bind with glucose to produce a direct, reproducible correlation of glucose levels. The Company expects to complete optimization of the sensing system by mid-2011, at which point it will begin to incorporate the glucose sensing system with the electronics of the RFID microchip to complete development of the glucose sensor.