ATTO Rho14 NHS ester

ATTO Rho14 NHS ester is an ATTO Rho14 fluorophore formulated as an N-hydroxysuccinimide (NHS) ester, enabling efficient covalent labeling of primary amines on proteins, peptides, and other amine-containing biomolecules. Its red-emitting fluorescence supports sensitive visualization and quantitative fluorescence workflows in chemical biology, microscopy, and assay development, where stable conjugates are required for imaging and readout.

1. Protein And Antibody Labeling

ATTO Rho14 NHS ester is frequently used by protein engineering and antibody conjugation teams to generate fluorescently labeled bioreagents for imaging and binding studies. By targeting lysine residues and N-termini, the NHS ester format supports straightforward preparation of dye-protein conjugates for fluorescence microscopy, fluorescence-based binding assays, and workflow development where amine-reactive labeling is preferred. Researchers often select this reagent when they need a red fluorophore for multicolor experiments and when covalent attachment helps maintain signal during washing and buffer exchanges.

2. Fluorescence Microscopy Tracing

ATTO Rho14 NHS ester supports cellular and biomolecular tracing experiments where red fluorescence is advantageous for separating signals from other channels. Investigators commonly prepare labeled protein probes, enzyme conjugates, or surface-associated labeling reagents using amine-reactive coupling, then use the resulting conjugates for fixed-sample imaging, localization studies, and colocalization experiments with spectrally distinct dyes. The covalent nature of NHS-amine labeling helps reduce dye loss during fixation and washing steps, improving robustness for microscopy workflows that rely on reproducible staining intensity.

3. Flow Cytometry Conjugates

ATTO Rho14 NHS ester is used in flow cytometry reagent development to produce red fluorescent conjugates from amine-containing targeting proteins, affinity reagents, or labeling carriers. By generating dye-biomolecule conjugates through lysine/N-terminus coupling, researchers can create consistent staining reagents for fluorescence readout in suspension assays, including binding and uptake studies. This labeling strategy is particularly useful when conjugate stability under assay conditions is important for maintaining fluorescence signal across acquisition runs.

4. Fluorescent Bioassay Reagents

ATTO Rho14 NHS ester is also applied in the construction of fluorescence-based assay components where labeled proteins serve as reporters, standards, or detection reagents. Teams developing fluorescence assays often use amine-reactive ATTO Rho14 conjugates to monitor binding events, track reagent distribution, or generate calibration materials for quantitative fluorescence measurements. The dye's red emission supports multiplexing and background-managed assay designs when paired with appropriate excitation/emission filter sets on common plate readers and fluorescence instruments.