Abstract: The present invention provides a transgenic mouse which exhibits a circling phenotype as a result of insertional mutagenesis. The insertional mutant was caused by introducing genetic material into the genome of the mouse, or an ancestor thereof, at an embryonic stage. The genetic material appears to alter or disrupt an endogenous genetic locus affecting motor function, resulting in the mutation. More particularly, transgenic mouse lines were made by microinjection of about 24 kb XhoI genomic DNA fragment containing the mouse Ren-2.sup.d renin gene into BCF.sub.1, fertilized eggs. One transgenic mouse line, designated TgX15 (also known as chakragati mice), bred to homozygosity was found to exhibit a circling phenotype. The transgenic mouse line TgX15 may be an important resource for investigating the molecular genetic mechanisms that determine specific aspects of brain function and behavior.

Abstract: An antitheft security system is disclosed for automotive, marine, and other valuable personal articles such as objects of art and valuable collectible objects. A dealer/installer is provided with equipment comprising a main unit having a memory, a keyboard for data entry, and a visual screen for monitoring the data entry procedure and also for displaying to the dealer the precise locations on the article where it is to be marked. The unit randomly selects different marking locations on the article by calling up form its memory a programmed universe of several hundred possible marking sites for each particular type of item. An image of the item is displayed on the visual screen, which indicates the exact location where each marking is to be made. The security codes are applied by a portable hand-held marking head containing an electrostatic, noncontact ink jet spraying nozzle which invisibly microprints a unique, classified security code in a dot matrix format of alphanumeric characters onto the surface.