Systems, apparatuses, and methods for searching for a match to a sequence of bits. Useful metals in the complexes include Ni, Pd, Fe and Co. The frame of this door panel is hinged to a similar frame attached to the perimeter of a cutout opening in the tent wall, against which the door closes. Ready operations are identified, where a ready operation is an operation that does not have any predecessor operations that have not yet been added to a partition. IL-13 receptor proteins, methods for their production, inhibitors of binding of IL-13 and its receptor and methods for their identification are also disclosed.