IgM-specific immunoblot analysis of different HCMV recombinant antigens with a selected serum sample from an HCMV-seronegative patient with acute EBV-induced IM (serum sample 8 [Table 1]). IgM-specific immunoblot analysis of different HCMV recombinant antigens with a selected serum sample from an HCMV-seronegative patient with acute EBV-induced IM (serum sample 8 [Table 1]). Amino acid numbering with respect to HCMV proteins in recombinant antigens is given in brackets. The positions of molecular mass markers are shown on the left. Dieter Lang et al. Clin. Diagn. Lab. Immunol. 2001; doi:10.1128/CDLI.8.4.747-756.2001