Anti-Phospho-Ser421 MeCP2 Antibody is suitable for Western Blots and is specific for the ~55 kDa truncated MeCP2 protein phosphorylated at Ser421. Immunolabeling of the MeCP2 band is blocked by preadsorption with the phospho-peptide used as antigen but not by the corresponding dephospho-peptide. Specific conditions for reactivity should be optimized by the end user.