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    CALTAG Laboratories was formed in late 1985 to take advantage of the extensive experience of the founders in the immunological reagents field. This experience spans the period from the 1960's to the present, and encompasses nearly all the significant advances in antibody technology. We have pioneered the commercial introduction of such developments as the affinity-isolation of antibodies (early 1970's), the PE-Cy5 tandem conjugates commonly used today for multi-color flow cytometry, and most recently the PE-Cy7 tandems.