Biotin-11-dCTP

Biotin-11-dCTP is a biotinylated deoxycytidine triphosphate analog designed for enzymatic incorporation of biotin into nucleic acids. As a nucleotide triphosphate, it is commonly used in DNA labeling workflows where the biotin handle enables downstream streptavidin-based capture, detection, or pull-down. The long, flexible biotin linker (11-atom spacer) helps improve accessibility of the biotin moiety for conjugation and immobilization steps in molecular biology and nucleic acid analysis.

1. DNA Labeling For Detection

Biotin-11-dCTP is widely used to introduce biotin into DNA during enzymatic synthesis, including nick translation, random priming, or polymerase-driven incorporation. Researchers and assay developers rely on the biotin tag to enable streptavidin or avidin-based readouts for gel-based detection, membrane blotting, and workflow-compatible nucleic acid capture. The extended linker supports efficient binding of the biotin moiety to streptavidin conjugates, which is particularly helpful when labeled DNA is subsequently processed, washed, or immobilized on solid supports.

2. Streptavidin-Based Nucleic Acid Pull-Down

Biotin-11-dCTP supports affinity enrichment of biotin-containing DNA fragments using streptavidin-coated beads or surfaces. This application is common in molecular biology workflows where specific DNA populations need to be isolated from complex mixtures for downstream analysis, such as sequencing library preparation, targeted fragment recovery, or purification of labeled probes. The nucleotide format allows incorporation directly during nucleic acid generation, enabling a streamlined path from labeling to affinity capture without requiring post-labeling chemistry.

3. Probe Construction For Hybridization Assays

Biotin-11-dCTP is used to generate biotin-labeled DNA probes for hybridization-based assays, including blotting formats and other hybridization workflows that use streptavidin/avidin detection. In these applications, the biotin label provides a robust handle for signal generation through streptavidin conjugates (for example, HRP or fluorophore-bearing streptavidin reagents), enabling visualization of hybridized target sequences. The flexible biotin spacer helps maintain accessibility of the label, supporting consistent detection across probe lengths and hybridization conditions.

4. Chromatin And DNA Enrichment Workflows

Biotin-11-dCTP is also used in nucleic acid enrichment strategies where biotinylated DNA fragments are captured for downstream characterization. Researchers often incorporate the biotin analog during DNA processing steps to create affinity-tagged material that can be isolated from reaction mixtures, facilitating cleaner inputs for downstream assays. This approach is commonly integrated into laboratory pipelines for fragment recovery and preparation of nucleic acid material that will be analyzed by downstream molecular techniques.