Running an SDS-PAGE gel is easier now than it has ever been. Worrying about whether or not the gel has polymerized is now a thing of the past thanks to pre-packaged gels (not to mention the amount of time saved). And now companies are making sure that the molecular weight markers you use are just as worry free. The newest standards can be found in a wide range of sizes (from 10 to 250 kD) and are available in a number of color options. All of them ensure sharp banding patterns, which removes the guesswork from plotting your standards. Take a look below at a few of the molecular weight markers available for protein gel electrophoresis.