Bis-Tris precast gels are widely used in protein electrophoresis for separating proteins based on their molecular weight. The 4-20% gradient allows for effective resolution of a broad range of protein sizes, making it suitable for analyzing complex protein mixtures. These gels are particularly useful in applications such as Western blotting, where precise separation of proteins is critical for accurate detection and quantification. The 15-well format is ideal for running multiple samples simultaneously, enhancing efficiency in high-throughput experiments. The 1.0mm thickness ensures consistent and reproducible results, while the plastic backing provides durability and ease of handling during gel casting, staining, and imaging processes. Bis-Tris precast gels are commonly employed in molecular biology, biochemistry, and proteomics research, as well as in quality control and diagnostic laboratories.