The fluorescent complex may be included in a latex microparticle, such as a styrene latex particle.

In one embodiment, for example, a peptide, protein, or glycoprotein substrate is joined to a reporter (e.g., dyed latex particle).

The reactive halo-aromatic groups on the surface of latex particle are servable as linkers to react with peptides, antibodies, nucleic acids, ligands or other biomolecules.

In one embodiment, for example, a peptide, protein, or glycoprotein substrate is joined to a reporter (e.g., dyed latex particle) and specific binding member (e.g., biotinylated compound).

A white inkjet ink includes an anionic surfactant having a molecular weight less than 10,000, a white pigment, a latex particle, and a balance of water.