C12 Lissamine-rhodamine Galactosylceramide is a fluorescently labeled version of C12 galactosylceramide (Item No. 24347). Lissamine-rhodamine B displays excitation and emission maxima of 560 and 575 nm, respectively.1 As this product is derived from a natural source, there may be variations in the sphingoid backbone. [Matreya, LLC. Catalog No. 2204]WARNING This product is not for human or veterinary use.