In cell biology and molecular research, accurately measuring protein expression levels is essential for understanding cellular health, metabolic activity, and signaling pathways. One protein that researchers commonly investigate is cytochrome c oxidase subunit IV (COX IV), a critical component of the mitochondrial respiratory chain. For reliable detection, scientists depend on high‑quality immunological reagents—especially a reliable cox iv antibody that can serve as a loading control and help normalize protein levels across samples.