This three color protein standard offers 12 pre stained proteins ranging from 10 to 245 kDa, clearly visible on gels and transfer membranes (but not on film or imaged blots). It is supplied at a high concentration of 3–3.5 mg/ml, delivering 2–3 times more product than many leading brands and sufficient for 100 to 150+ applications under recommended conditions. Reference bands: Includes two distinct markers—a green band at 25 kDa and a red band at 75 kDa—when separated on SDS PAGE (Tris glycine buffer). Applications: Ideal for monitoring protein separation during SDS PAGE, verifying Western transfer efficiency, and estimating protein s. Loading volumes: Use 3 µl per lane for 15 well mini gels or 5 µl per lane for 10 well mini gels. For Western transfers, 1.5–2.5 µl per lane is sufficient, with larger volumes recommended for thicker (>1.5 mm) or larger gels. Stability: Stable up to 2 weeks at 25 °C, up to 3 months at 4 °C, and long term at –20 °C.