Unstained standards allow accurate MW determination on SDS-PAGE gels. Every batch is tested for proper mobility, providing a reliable control for gel-to-gel variability.
SDS-PAGE standards are blended to give uniform band intensities when stained with Coomassie Blue R-250 or zinc stains. SDS-PAGE standards are available in broad, low, high, and polypeptide molecular weight ranges, allowing calibration in almost any percentage gel.
Polypeptide SDS-PAGE standards are for molecular weight determination of peptides and small proteins resolved on Tricine gels. Consisting of six polypeptides with molecular masses ranging from ~1.4 to ~26.6 kD, polypeptide SDS-PAGE standards stain uniformly with Coomassie Blue G-250 stain.