RayBio® Phospho-ATM (Ser1981) and Total ATM ELISA kit is a very rapid, convenient and sensitive assay kit that can monitor the activation or function of important biological pathways in human cell lysates. By determining phosphorylated ATM protein in your experimental model system, you can verify pathway activation in your cell lysates. You can simultaneously measure numerous different cell lysates without spending excess time and effort in performing a Western Blotting analysis. This Sandwich ELISA kit is an in vitro enzyme-linked immunosorbent assay for the measurement of human phospho-ATM and total ATM. An anti-pan ATM antibody has been coated onto a 96-well plate. Samples are pipetted into the wells and ATM present in a sample is bound to the wells by the immobilized antibody. The wells are washed and rabbit anti-ATM (Ser1981) antibody is used to detect phosphorylated ATM or biotinylated anti-ATM antibody is used to detect pan ATM. After washing away unbound antibody, HRP-conjugated anti-rabbit IgG or HRP-conjugated streptavidin is pipetted to the wells. The wells are again washed, a TMB substrate solution is added to the wells and color develops in proportion to the amount of ATM (Ser1981) or pan ATM bound. The Stop Solution changes the color from blue to yellow, and the intensity of the color is measured at 450 nm.

Upon receipt, the kit should be stored at –20°C. Please use within 6 months from the date of shipment. After initial use, Wash Buffer Concentrate (Item B), Assay Diluent (Item E), TMB One-Step Substrate Reagent (Item H), Stop Solution (Item I) and Cell Lysate Buffer (Item J) should be stored at 4°C to avoid repeated freeze-thaw cycles. Return unused wells to the pouch containing desiccant pack, reseal along entire edge, and store at –20°C. Item D, store at 2-8°C for up to one month (store at -20°C for up to 6 months, avoid repeated freeze-thaw cycles). Reconstituted Positive Control (Item K) should be stored at -70°C.