iodine

Cy2 is a cyanine dye used for labeling amino groups in oligonucleotides, peptides, and proteins (λ excitation: 488 nm; λ emission: 520 nm).

Cy2-SE (iodine) is a Cy2 derivative with excitation/emission wavelengths of 475/510 nm. Cy2 is an amine-reactive fluorophore commonly employed for fluorescent labelling of proteins and nucleic acids.

2,6-Diiodo-BODIPY 493/503 is a modified BODIPY fluorescent dye whose 2,6-diiodo substituent enhances its photostability and resistance to photobleaching. 2,6-Diiodo-BODIPY 493/503 is commonly used for labeling and imaging lipid droplets and lipid-associated structures.