BDP 650/665 maleimide

BDP 650/665 maleimide is a BODIPY-based far-red fluorescent labeling reagent bearing a maleimide functional group for efficient conjugation to thiols. Its red-shifted emission supports fluorescence microscopy and fluorescence-based readouts where spectral separation from common green dyes is advantageous. In typical workflows, the maleimide enables straightforward attachment to cysteine-containing biomolecules, thiol-terminated oligonucleotides, and sulfhydryl-bearing surfaces for imaging and assay development.

1. Thiol-Tagged Biomolecule Labeling

BDP 650/665 maleimide is used to fluorescently label peptides, proteins, and other thiol-containing biomolecules for downstream fluorescence imaging and quantitative fluorescence assays. Researchers commonly incorporate the dye into conjugates such as cysteine-terminated peptides or engineered cysteine variants to generate far-red tracers for localization studies, binding experiments, and labeling controls. The maleimide handle provides a practical route to obtain dye-biomolecule conjugates that can be directly used in fluorescence microscopy workflows or in plate-based fluorescence measurements.

2. Fluorescence Microscopy Tracing

BDP 650/665 maleimide supports cellular and material imaging workflows where far-red fluorescence reduces background from autofluorescence and enables multicolor experiments. In microscopy studies, the reagent is frequently applied to label thiol-functionalized targeting ligands, biomaterials, or nanoparticles that are then visualized in cell culture or in engineered matrices. By converting thiol-bearing components into fluorescent constructs, investigators can track transport, localization, and association with biological surfaces under standard fluorescence imaging instrumentation.

3. Oligonucleotide and Probe Conjugation

BDP 650/665 maleimide is also used in nucleic-acid labeling and fluorescent probe construction when thiol-modified oligonucleotides are available. Researchers conjugate the dye to thiol-terminated strands to generate fluorescent oligonucleotide probes for hybridization-based studies, nucleic acid tracking experiments, and fluorescence readouts that benefit from far-red emission. This labeling approach is commonly selected when spectral compatibility with other fluorophores or reduced interference from cellular background is important for nucleic acid analysis workflows.

4. Thiol-Functional Surface Modification

BDP 650/665 maleimide is employed for fluorescent surface functionalization of thiol-reactive materials, including polymer coatings, hydrogels, and sensor surfaces bearing sulfhydryl groups. Developers use the dye to create far-red fluorescently tagged interfaces for material characterization, surface adsorption studies, and imaging-based assessment of coating uniformity or biomolecule immobilization. The maleimide functionality allows incorporation into thiol-containing surface chemistries, enabling researchers to generate stable fluorescent reporters for microscopy and other fluorescence measurement platforms.