Biotin-Aniline | CAS 769933-15-5

Biotin-Aniline is a biotinylated aniline derivative designed to introduce a biotin handle into chemical biology workflows. The aniline functionality provides a convenient aromatic scaffold for reagent conjugation and downstream coupling, while the biotin moiety enables strong affinity capture by streptavidin or avidin for pull-downs, immobilization, and affinity-based detection. In fluorescence and analytical setups, Biotin-Aniline is commonly used as a functional biotin intermediate to build labeled conjugates, affinity reagents, and immobilized materials for biomolecule capture.

1. Streptavidin Pull-Downs

Biotin-Aniline is frequently used in affinity purification and pull-down experiments where researchers need to capture biotin-tagged proteins, peptides, or nucleic-acid-associated complexes. In typical workflows, Biotin-Aniline is incorporated into custom conjugates or used to functionalize capture reagents so that the target of interest can be enriched on streptavidin or avidin surfaces, followed by downstream LC-MS, immunoblotting, or gel-based readouts. This makes it a practical biotin-building block for proteomics sample preparation, interaction studies, and workflow development in chemical biology laboratories.

2. Surface Immobilization Capture

Biotin-Aniline supports immobilization strategies for biosensor and assay development by providing a biotin anchor that binds strongly to streptavidin-coated plates, beads, and sensor surfaces. Researchers use it to create stable, affinity-based attachment of biomolecules or affinity reagents to solid supports without requiring covalent surface chemistry for every construct. This approach is widely used in assay prototyping, where consistent surface presentation of the biotin-functional conjugate is important for reproducible binding and signal generation in plate-based fluorescence assays, chemiluminescent formats, or other surface-capture workflows.

3. Labeled Conjugate Construction

Biotin-Aniline is commonly employed as a biotin-functional intermediate for constructing labeled conjugates used in molecular imaging reagent development and targeted binding assays. Teams building fluorescent or affinity-tagged probes often use Biotin-Aniline to introduce a biotin handle into their conjugate architecture so that the final reagent can be captured, immobilized, or detected via streptavidin/avidin systems. This enables flexible modular design for custom probe libraries, affinity standards, and biotin-mediated assay controls where the biotin tag serves as a universal recognition element across different detection platforms.