Fig 1.

Dose level 4 immunoglobulin G responses to human epidermal growth factor receptor 2 peptide vaccines. Enzyme-linked immunosorbent assay was carried out for patients A through F, as discussed in Patients and Methods. Antibody titers were defined as the reciprocal of the highest serum dilution with an absorbance of 0.2. 1y + 3w, blood drawn 3 weeks after the first immunization; 3y + 1w, blood drawn 1 week after third immunization. The y-axis represents the titer after subtracting the patient presera value and the blank.