NativePAGE™ 5% G-250 Sample Additive - FAQs

We recommend using the NativeMark Unstained Protein Standard, Cat. No. LC0725 for native gel electrophoresis with Tris-Glycine, NuPAGE Tris-Acetate or NativePAGE gels.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

We do not recommend using NativePAGE Sample and Running buffers with NuPAGE Bis-Tris gels. NuPAGE Invitrogen Bis-Tris gels are optimized for denaturing conditions and have an extremely low operating pH (pH 7.0), which makes it difficult for most proteins to migrate through them in a native state.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.

NativePAGE Sample Buffers and Running buffers were developed specifically for use with the NativePAGE Bis-Tris gels. We do not recommend using these buffers for native applications with any other gels, including NuPAGE Tris-Acetate or Invitrogen Tris-Glycine gels. For those gels, we recommend using the Invitrogen Tris-Glycine Native Sample and running buffers.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.

The NativePAGE 5% G-250 Sample Additive is a concentrated stock solution of Coomassie G-250 designed for use with detergent (non-ionic) containing samples prepared for NativePAGE gel electrophoresis. Native proteins normally migrate on the gel according to natural charge/pI in the pH of gel buffer, but adding the Coomassie G-250 renders an associated negative charge even to high pI proteins that would normally have a positive charge. It binds to proteins non-specifically without denaturing them. The NativePAGE 5% G-250 Sample Additive is added to the cathode buffer and, optionally, to samples as well.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.

The NativePAGE 5% G-250 Sample Additive (Cat. No. BN2004) is a concentrated stock solution of Coomassie G-250 designed for use with detergent (non-ionic) containing samples prepared for NativePAGE gel electrophoresis. The exact composition of the NativePAGE 5% G-250 Sample Additive is proprietary. It does not contain a detergent.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.

NativePAGE Sample Buffers and Running buffers were developed specifically for use with the NativePAGE Bis-Tris gels. We do not recommend using these buffers for native applications with any other gels, including Invitrogen Tris-Glycine gels. For those gels, we recommend using the Invitrogen Tris-Glycine Native Sample and running buffers.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.

NativePAGE Sample Buffers and Running buffers were developed specifically for use with the NativePAGE Bis-Tris gels. We do not recommend using these buffers for native applications with any other gels, including NuPAGE Tris-Acetate gels. When running Tris-Acetate gels under native conditions, we recommend using the Invitrogen Tris-Glycine Native Sample and running buffers.

Find additional tips, troubleshooting help, and resources within our Protein Electrophoresis and Western Blotting Support Center.