Methods and systems for improving communication throughput of a link between SASSATA devices. The filter medium are presently preferably positioned such that each succeedingly distal filter layer or zone from the separator has a decreased particle retention capability than each proceeding filter layer or zone. The current path isolated is formed to supply a testing voltage to the selected row line from a testing voltage source. Based on the payment authentication information, the trusted party component pays the merchant on behalf of the customer without the confidential payment information of the customer being disclosed to the merchant. The system further includes a power actuation system in communication with and responsive to the switch to move the liftgate from the closed position to the opened position when the switch is in the closed position. The invention particularly concerns the use of a fusion protein of streptavidin and protein A sequences to form a non-covalent complex of a toxin or nucleic acid and an antibody.