This invention relates to the PrtR-PrtK cell surface protein of Porphyromonas gingivalis and in particular a multimeric cell associated protein complex comprising the PrtR and PrtK proteins. In one embodiment, the method includes the steps of maintaining, in memory, a plurality of user profiles and a plurality of images associated with each user profile and selecting an image associated with the user. A fault condition is asserted when the peak detection signal is asserted for a sufficient length of time to indicate that an actual fault is detected. The write bit line is shared by plural memory cells and connected to a data input node. When the arrow is released the slide unsnaps from the cradle and moves in unison with the arrow as the arrow moves out of the bow. One end of the cell string is electrically connected to outside through a string selection transistor formed on one end of the wall type semiconductor.