3'-(6-Fluorescein) CPG

3'-(6-Fluorescein) CPG is a fluorescein-labeled controlled pore glass (CPG) solid support designed for constructing fluorescently tagged oligonucleotides during automated DNA/RNA synthesis. With a fluorescein reporter tethered to the CPG surface, it enables direct incorporation of a 3'-end fluorescein label, supporting downstream fluorescence microscopy and fluorescence-based nucleic acid analysis workflows that rely on a covalently attached dye rather than post-labeling. Researchers use this support to build labeled probes, primers, and standards where the fluorophore position and linkage stability are important for consistent signal readout.

1. 3'-Fluorescent Oligonucleotide Synthesis

3'-(6-Fluorescein) CPG is used by oligonucleotide synthesis groups to generate 3'-fluorescein-labeled DNA or RNA constructs in a single automated workflow. Fluorescein at the 3'-terminus is commonly leveraged for fluorescence imaging of nucleic acids, fluorescent tracking in hybridization experiments, and labeling strategies where the dye must remain attached through purification and assay handling. This format is particularly attractive for probe developers who want to control fluorophore placement during synthesis rather than relying on separate dye conjugation steps.

2. Fluorescence Hybridization Probes

3'-(6-Fluorescein) CPG supports the preparation of fluorescent hybridization probes used in nucleic acid detection and characterization workflows. A 3'-fluorescein label provides a readout compatible with standard fluorescence detection platforms used for monitoring target binding, probe performance, and hybridization behavior in research assays. Typical users include molecular biology laboratories and assay development teams building fluorescence-based nucleic acid tools for method development, workflow optimization, and analytical testing.

3. Fluorescent Primer and Standard Preparation

3'-(6-Fluorescein) CPG is applied to produce fluorescein-tagged primers and quantitative or qualitative fluorescence standards for nucleic acid workflows. When a stable, covalent dye label is required for consistent measurement across synthesis batches and downstream processing, a labeled solid support helps ensure reproducible labeling at the 3'-end. This approach is commonly used in research settings where labeled oligos are used as calibration materials, reference reagents, or visualization controls in fluorescence microscopy and fluorescence readout assays.

4. Fluorescence Microscopy Nucleic Acid Labeling

3'-(6-Fluorescein) CPG is employed to generate fluorescent nucleic acid reagents for cellular and molecular imaging experiments that visualize DNA/RNA localization or nucleic acid-associated processes. A 3'-fluorescein label enables detection of labeled oligonucleotides using fluorescence microscopy systems, supporting studies where covalent dye attachment improves handling robustness compared with noncovalent labeling. Imaging-focused users often choose this solid support when they need a defined dye position to maintain probe performance during hybridization and sample processing.