Tegument antigens included portions of pp150 (UL32) and pp52 (UL44) proteins, including CG1 (pp150/2-pp52/3, comprised of amino acids 495–691 and 862–1048 of pp150) and CG2 (pp150/7-pp150/1, comprised of amino acids 695–864 of pp150 and 297–433 of pp52), which were previously reported to be immunodominant targets for sero diagnosis of primary and chronic CMV infection (37, 38). The gene discussed is LSP1; the disease is cytomegalovirus infection.