Prestained standards for SDS-PAGE and western blotting provide a quick and easy way to monitor protein separation during electrophoresis and to assess transfer efficiency on blots. Each lot of Kaleidoscope and SDS-PAGE prestained standards is individually calibrated for estimating the MW of sample proteins.
Kaleidoscope™ Standards
Kaleidoscope prestained standards are broad range and have individually colored proteins to allow instant orientation on SDS-PAGE gels and western blots.
Calibrated Molecular Weights* of Kaleidoscope Standards
| Protein |
Color |
Prestained |
| Myosin |
Blue |
216,000 |
| β-Galactosidase |
Magenta |
132,000 |
| BSA |
Green |
78,000 |
| Carbonic anhydrase |
Violet |
45,700 |
| Soybean trypsin inhibitor |
Orange |
32,500 |
| Lysozyme |
Red |
18,400 |
| Aprotinin |
Blue |
7,600 |
* MWs are of representative lots; actual weights may vary. Lot-specific MWs are included with each vial.
Prestained SDS-PAGE Standards
Original Bio-Rad prestained SDS-PAGE standards are available in broad, low, and high ranges.
Calibrated Molecular Weights* of Prestained SDS-PAGE Standards
| Protein |
Broad Range |
Low Range |
High Range |
| Myosin |
209,000 |
— |
204,000 |
| β-Galactosidase |
124,000 |
— |
123,000 |
| Phosphorylast b |
— |
103,000 |
— |
| BSA |
80,000 |
77,000 |
80,000 |
| Ovalbumin |
49,100 |
50,000 |
48,000 |
| Carbonic anhydrase |
34,800 |
34,300 |
— |
| Soybean trypsin inhibitor |
28,900 |
28,800 |
— |
| Lysozyme |
20,600 |
20,700 |
— |
| Aprotinin |
7,100 |
— |
— |
* MWs are of representative lots; actual weights may vary. Lot-specific MWs are included with each vial.
