Bio Basic's prestained protein ladder aids in approximating separated protein sizes on SDS-PAGE gels. It's a blend of recombinant proteins spanning 10 kD to 250 kD. Red or green bands at 70 kD and 25 kD simplify molecular weight identification. The ladders' molecular weights are verified using the Tris-Glycine SDS-PAGE system, ensuring >95% accuracy. They're highly stable, with minimal band broadening during storage, and are conveniently packaged for immediate use, requiring no heating, diluting, or additional reducing agents.