Device enumeration support techniques are described for busses that do not natively support enumeration. A light source, which emits a light pulse upon receipt of a request signal and an optical fiber that transmits the light pulse from the light source to the scanning device and for illuminating the scale. B2L protein is particularly useful as an adjuvant for poorly immunogenic tumor vaccines and subunit vaccines, such as those useful for preventing andor treating flu, tuberculosis, respiratory syncytial virus, anthrax and HIV. The inner shade has a closed upper end and multiple blades formed on the upper end. In particular, the WDM contains a fiber pigtail having a fiber bundle and a ferrule with a square aperture in the center.