Western Blot analysis of yeast cell extracts untreated and treated with 4-NQO, a potent activator of ATM/ATR homologues, using A4000-15,

Chk2 transfected and UV treated COS cell extracts immunoprecipitated with Chk2 antibody then detected by Western Blot, using A4000-15,

A4000-15 DELFIA Assay: Signal-to-noise ratio of phospho- versus nonphospho-peptides. (S* or T* denote phosphorylated serine or threonine.)