A chimeric fibroblast growth factor protein and recombinant nucleic acid molecule encoding the same are disclosed. The field linking unit is electrically coupled to a field device, and a signal is transferred between the two using a first protocol. The substance switch is activated to transfer a substance in response to detection of a contactless proximity target associated with one of the substance communicating devices by a proximity sensor associated with the other of the substance communicating devices. A method is provided for treating a disorder associated with glutamate transport. This direct drive produces a very compact type of construction and it is possible to dispense with easily wearing threaded spindles.