ATTO Rho14 maleimide

ATTO Rho14 maleimide is a reactive ATTO Rho14-family red/orange fluorescent dye supplied as a maleimide for thiol-selective labeling of biomolecules. The maleimide functional group enables efficient conjugation to cysteine-containing peptides, proteins, and other thiol-bearing targets used in fluorescence microscopy, imaging reagent development, and quantitative fluorescence assays. Its strong fluorescence output supports sensitive visualization and tracking of labeled biomolecular constructs in common optical readouts.

1. Protein Thiol Labeling

ATTO Rho14 maleimide is widely used by protein chemistry and chemical biology groups to generate fluorescently labeled proteins for fluorescence imaging and assay development. Researchers typically incorporate the dye into cysteine-containing proteins, antibodies, or affinity reagents to create tracking conjugates for binding studies, localization workflows, and fluorescence-based readouts in plate readers or microscopes. The maleimide handle supports straightforward preparation of dye-labeled bioconjugates used in downstream experiments such as receptor binding characterization, protein interaction mapping, and labeling of purified protein domains for visualization.

2. Peptide And Biomolecule Conjugates

ATTO Rho14 maleimide supports fluorescent labeling of peptides and other thiol-functional biomolecules used as molecular probes in cellular and biochemical studies. Investigators use the dye to produce labeled peptide ligands, cyclic or linear peptide constructs, and cysteine-modified biomolecules for microscopy experiments and fluorescence-based binding assays. In these workflows, the dye's bright emission helps researchers monitor labeled constructs in complex mixtures, enabling visualization of peptide localization or tracking of peptide uptake and distribution in experimental systems where optical detection is required.

3. Flow Cytometry Labeling Reagents

ATTO Rho14 maleimide is used to prepare fluorescent labeling reagents for flow cytometry workflows where red/orange-emitting conjugates are advantageous for multicolor panels. By labeling thiol-containing targeting proteins, labeling antibodies with accessible cysteines, or generating dye-tagged affinity reagents, researchers create reagents that report on binding to cell-surface or extracellular targets under their established staining protocols. The maleimide chemistry supports reproducible conjugate preparation for instrument-based quantification, enabling consistent fluorescence readouts in cell analysis experiments that rely on optical gating and multichannel discrimination.

4. Fluorescent Imaging Of Conjugates

ATTO Rho14 maleimide is commonly employed in fluorescence microscopy and molecular imaging reagent development to visualize labeled bioconjugates with red/orange fluorescence. Laboratories use dye-labeled proteins, peptides, or other thiol-bearing constructs to track biomolecular localization, study transport or binding behaviors, and generate fluorescent standards for imaging experiments. The maleimide functionality is particularly useful when researchers need to attach a fluorophore to a defined cysteine site on a biomolecule, producing imaging reagents that integrate into established microscopy workflows with conventional excitation/emission detection.