The present invention relates to transgenic animals, as well as compositions and methods relating to the characterization of gene function. The improved mounting cup comprises a peripheral rim located in proximity to an outer periphery of the mounting cup for sealing the mounting cup to the aerosol container. Moreover, in implementations where a data strobe signal line is bidirectional, and capable of being driven either by the data source or by another circuit used to access the data source, disabling data latching as described herein can minimize the risk of driver damage resulting from conflicting attempts to drive the data strobe signal line at both ends. Each entry in the FEPT may include a protection domain, along with other protection table context information, against which IO requests may be checked to determine if an application instance that submitted the IO requests may access the file identified in the IO requests.