Monoclonal mouse anti-biotin reacts with the biotin conjugated IgG. This product is prepared by labeling high quality monoclonal mouse anti-biotin IgG (H+L) with CF405S dye. CF405S is a blue fluorescent dye with an absorption peak wavelength that nearly coincides with the 405 nm blue diode laser line. In addition, the emission peak wavelength of the dye well centers within the blue detection window of BD flow cytometers. As a result, flow cytometry analysis using CF405S dye results in much brighter signal than that using Alexa Fluor? 405.