This affinity purified antibody is directed against the 6X His epitope and is useful in determining its presence in over expressed proteins in various assays. The antibody recognizes the 6X His epitope tag (His-His-His-His-His-His) fused to either the amino- or carboxy- termini of targeted proteins in transfected or transformed cells. This product is prepared by labeling high quality monoclonal mouse anti-6X His IgG (H+L) with the far-red fluorescent dye CF640R.CF640R is a novel rhodamine-based dye spectrally very similar to Cy?5 and Alexa Fluor? 647. CF640R is much brighter than Cy?5 and at least as bright as Alexa Fluor? 647 when excited at 633 or 635 nm. However, the most important advantage of CF640R is its exceptional photostability. CF640R is far more photostable than the cyanine-based dyes Cy?5 and Alexa Fluor? 647. It is also more photostable than Atto 647N, a dye that has been extensively used in single molecule-based imaging. CF640R is also extremely water-soluble and pH-insensitive. These properties make CF640R a much better alternative to Cy?5, Alexa Fluor? 647 and other spectrally similar dyes. Please download the CF640R dye flyer for more details.