ATTO 655 amine

ATTO 655 amine is a reactive ATTO 655 fluorophore bearing an amine functional group, enabling straightforward incorporation into fluorescent labeling workflows through standard bioconjugation chemistries. Its red spectral output is commonly leveraged for multicolor fluorescence imaging where reduced spectral overlap with green/yellow channels is advantageous. Researchers use ATTO 655 amine as a dye building block to generate fluorescent conjugates for microscopy, spectroscopy, and quantitative fluorescence assays.

1. Protein And Peptide Labeling

ATTO 655 amine is frequently used by protein and peptide researchers to prepare fluorescent conjugates for tracking binding, localization, and biomolecular interactions in solution and on surfaces. The amine handle supports downstream coupling strategies to introduce the dye onto lysine-containing proteins, peptides, or carrier proteins used in assay development. In fluorescence microscopy and plate-based fluorescence assays, ATTO 655-labeled biomolecules provide a robust red channel readout for monitoring target engagement or reagent distribution in complex biological matrices.

2. Fluorescent Imaging Tracers

ATTO 655 amine serves as a practical labeling reagent for generating red-emitting imaging tracers used in cellular and materials microscopy workflows. Investigators incorporate the dye into labeled polymers, nanoparticles, or biomolecule conjugates to visualize transport, adsorption, and spatial organization under fluorescence imaging conditions. The amine functionality enables conjugate construction for tracer preparation, supporting consistent labeling of imaging reagents intended for confocal microscopy and other fluorescence imaging platforms that detect longer-wavelength emission.

3. Multicolor Assay Development

ATTO 655 amine is commonly selected for multicolor fluorescence assay development where a red-emitting dye is needed alongside green or orange reporter channels. Assay developers use ATTO 655-containing conjugates as detection labels in fluorescence readouts such as binding assays, labeling-based quantification, and reagent tracking experiments. The amine group facilitates conjugate construction for assay reagents, including fluorescent standards and labeled components used to calibrate or normalize signals across experimental runs.

4. Oligonucleotide And Nucleic Acid Labeling

ATTO 655 amine is also used in nucleic acid analysis workflows to produce fluorescently labeled oligonucleotides for hybridization-based studies and fluorescence readouts. The amine functionality supports dye attachment strategies that yield labeled probes and reference oligos for fluorescence detection in molecular biology and analytical chemistry applications. In fluorescence-based nucleic acid experiments, ATTO 655 provides a red channel signal that can be advantageous when designing multicomponent probe sets or when separating readouts from shorter-wavelength dyes.