Immunohistochemical analysis of paraffin-embedded human breast carcinoma using Phospho-S6 Ribosomal Protein (Ser235/236) (D57.2.2E) XP<sup>®</sup> Rabbit mAb in the presence of control peptide (left) or Phospho-S6 Ribosomal Protein (Ser235/236) Blocking Peptide #1220 (right).