Methods, systems, and apparatuses for tracking items automatically are described. Also provided are drug conjugates with an amino acid or derivative thereof for facilitating such targeted drug delivery. A hollow cylindrical post extends from the underside of the plate, at each end of the plate. By forming the transistors in their own separate wells with the source of the second transistor connected to its own well, breakdown of the circuit is governed by the sum of BVdss of the first transistor and a gate induced breakdown of the second transistor.