PROTEIN MEMORY

PHOTOCYCLE OF BACTERIORHODOSPIN

Protein based memory use protein seen in halobacteriumhaobium for storage of data.On exposure to laser these protein changes it state.These stable states are used for the storage of binary data.On exposure to red laser they changes to O state which is equivalent to binary 0.When exposed to green laser it changes to P state it is eqivalent to binary 1.these two stable states are used for storing data in binary form.Only O state absorb red light,this is used for data reading.Blue laser will bring the protein to ground state this is used for data erasing.Protein memory can be produced in large quantity and is stable at hgh temperature.A cube 1.6cm dimension can store upto 16gb data.