ARG20150 anti-P53 phospho (Ser15) antibody WB image Western Blot: 1. Untreated HeLa cell 2. UV-traeted HeLa cell stained with anti-p53 (phospho Ser15) antibody (ARG20150). The antibody detects ~53 kDa Ser15 phosphorylated p53. It does not react with non-phosphorylated p53 or p53 phosphorylated at other sites.