NuPAGE® Sample Reducing Agent (10X) is used to reduce protein samples for protein gel electrophoresis. NuPAGE® Sample Reducing Agent contains 500 mM dithiothreitol (DTT) at a ready-to-use 10X concentration in a stabilized liquid form. Use NuPAGE® Sample Reducing Agent when running proteins on NuPAGE® Novex® Bis-Tris gels to maintain protein samples in a reduced state during electrophoresis.