PhosphaGLO AP Substrate is the chemiluminescent substrate of choice for easy, reliable detection of picogram protein levels via alkaline-phosphatase (AP) in Western blotting or ELISA. Product is a ready-to-use, 1-component substrate requiring no special blocking solutions. Other features and benefits include: Long glow times up to five days; allows for repeated exposures (Western Blot) or luminosity readings (ELISA). Easy-to-follow protocol; simply add to microwell or blot and detect within minutes. Easily interchangable with other AP chemiluminescent substrates; requires little optimization to switch. Product is stable for two years at 4deg. C; no worries about rapidly degrading substrates. Compatible with film or with a chemiluminescent imager; provides flexibility for recording permanent results. Cost effective; PhosphaGLO offers cost savings per blot when compared to other chemiluminescent AP substrates.