The present invention is directed to novel polypeptides and to nucleic acid molecules encoding those polypeptides. The image acquisition system is configured to optically and digitally image an object so as to produce an object image The microscope components are at least one of motorized and electrically controllable. Further, the elevator door control device and method include a learn feature whereby parameters of the particular installation are incorporated over time into programming to update same. A button may selectively disengage the pins of the latch from the blade, to allow the blade to be removed from the carrier and to be replaced with new blades.