RGST‑45A is an affinity‑purified rabbit polyclonal antibody specific for the GST (Glutathione S‑Transferase) tag, one of the most widely used fusion tags in recombinant protein expression and purification. The affinity‑purification process enriches high‑specificity immunoglobulins, ensuring strong, selective binding to GST with minimal background across a variety of immunoassay platforms. This reagent is ideal for Western blotting, ELISA, immunoprecipitation, and immunofluorescence applications requiring reliable detection of GST‑tagged proteins. Produced by Immunology Consultants and supplied in a 1 mg format, RGST‑45A provides consistent, high‑quality performance for researchers working with GST fusion constructs, protein expression systems, and tag‑based detection workflows