PLSCR1 and cytomegalovirus infection: To further confirm the PLSCR1-mediated suppression of HCMV growth, the numbers of MIE antigen- and gB antigen (identified as an early gene product)-positive cells in the HEL, 36T-3, PLS1KO-A, and PLS1KO-B cell lines after HCMV infection were determined by immunofluorescence staining.