This FITC‑conjugated anti‑HA tag antibody provides a ready‑to‑use fluorescent reagent for direct detection of HA‑tagged proteins in microscopy, flow cytometry, and fluorescent immunoassays. Produced in chicken and supplied at 1 mg, this conjugate offers bright, stable fluorescence with minimal background, eliminating the need for secondary antibodies. Its high specificity and affinity‑purified quality ensure clear visualization and reliable quantification of HA‑tagged constructs in protein localization, expression analysis, and rapid screening workflows. An excellent tool for fluorescence‑based HA detection.