A reagent for biomaterials assay of (fluorescent dye).sub.n --avidin--a compound having a plurality of reactive groups--a biomaterial, or a reagent in which avidin is bound to a compound having a plurality of reactive groups through biotin in the above, a plastic fiber optics necessary for utilizing...http://www.google.fr/patents/US5401469?utm_source=gb-gplus-shareBrevet US5401469 - Plastic optical biomaterials assay device