A vehicle includes a power source, such as an engine, an electric machine, or combination thereof. A general method is provided for creating site-specific, biologically active conjugates of these proteins. This process has been found to provide a painted andor stained door which has an appearance indistinguishable from a wooden door. The interleaver may add padding bits to the interleaver matrix to fill any remaining positions, and after performing an interleaving operation, the interleaver may prune the padding bits to provide a sequence of interleaved bits for subsequent modulation on the orthogonal subcarriers. A protected memory lockword may be implemented as a portion of a protected content addressable memory.