Originating manufacturer of this product, immunogen description: Recombinant Protein Epitope Signature Tag (PrEST) antigen sequence KESCDVQLYIKRQSEHSILAGDPFELECPVKYCANRPHVTWCKLNGTTCVKLEDRQTSWKEEKNISFFILHFEPVLPNDNGSYRCSANFQSNLIESHSTTLYVTDVKSASERPSKDEMASRP; Manufacturer approved use: IHC