ErbB-2 (HER2/neu). MAbs ERB-D6, ERB-D8 react with peptide ILDV2 (MAb ERB-D6 reacts preferably with phosphorylated peptide and MAb ERB-D8 reacts strongly with dephosphorylated peptide). MAbs ERB-B2, ERB-F9 react with peptide ILDV4 (MAb ERB-B2 reacts preferably with phosphorylated peptide and MAb ERB-F9 reacts strongly with dephosphorylated peptide).