| abstract |
Fluorescent and chemiluminescent labelling compositions comprise a linear polysaccharide backbone molecule having a plurality of target-binding molecules, such as antibodies or nucleic acids, attached at spaced-apart intervals thereon. Each of the target-binding molecules, in turn, includes a multiplicity of fluorescent or chemiluminescent dye molecules bound thereto. In this way, signal introduced to a single target-site on a solid phase surface may be increased without loss of binding activity. |