A composition capable of showing a color change sufficient for indicating the presence andor concentration of a protein in a protein-containing liquid sample by contacting with the sample, comprising: indium or an indium compound, and a dye or pigment capable of forming a complex with indium. The processor is coupled to the on-chip boot ROM and to the non-volatile security identification element to selectively execute boot code depending on the non-volatile information of the non-volatile security identification element. The RFID tag couples to an object such as the body of a living organism or a metallic article. Cell lines that may be used in the methods of identification are also disclosed. A virtual network address may be assigned to the user for network address translation purposes. Complex multiplier 411 performs a complex multiplication using the received digital baseband signal and the signal delayed by delay circuits 409 and 410.