Bis-Tris precast gels are widely used in protein electrophoresis for separating proteins based on their molecular weight. The 4-15% gradient allows for the 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 protein separation is critical for accurate detection and quantification. The 1.5mm thickness ensures sufficient sample loading capacity while maintaining sharp band resolution. The glass-backed format provides durability and ease of handling during gel casting, running, and staining processes. These gels are commonly employed in research laboratories for studying protein expression, post-translational modifications, and protein-protein interactions. Their precast nature saves time and ensures consistency, making them a reliable choice for high-throughput protein analysis.