Note: “*” indicates the amino acids with phosphorylation. The letter “c” means cysteine appended to the Sulfo-SMCC cross-linker. Mutated residues are underlined. Synthetic peptides of the IBDV VP4 pro
1SCC = squamous cell carcinoma, AK = actinic keratosis, KA = keratoachantoma, WGA = multiple displacement amplification 2Some samples were available in low volume and not included in all experiments.