Bis-Tris precast gels are widely used in protein electrophoresis for separating proteins based on their molecular weight. The 4-20% gradient allows for the resolution of a broad range of protein sizes, making it suitable for analyzing complex protein mixtures. These gels are particularly effective for applications such as Western blotting, where precise protein separation is critical for accurate detection. The 1.5mm thickness ensures sufficient sample loading capacity while maintaining resolution. The glass-backed format provides durability and ease of handling during gel casting and electrophoresis. These gels are ideal for research in molecular biology, biochemistry, and proteomics, where high-quality protein separation is essential for downstream analysis.