The present invention relates to a novel BAIT protein which is a member of serpin superfamily which is expressed primarily in brain tissue. The method further includes developing a test procedure based on the topology and a plurality of constraints, where a first constraint in the plurality of constraints includes sending a test data stream through each communication path in the plurality of communications paths only once in each direction. A lower total gas flow helps to improve the vacuum in the charged particle beam region. Accessory pockets and removable carriers such as a shoulder strap or a pair of handles may be part of the protective bag.