By contrast , DENV-2 entry into A549 cells was clathrin - dependent ,
as previously reported in HeLa , C6/36 and BS - C-1 cells .
By contrast , DENV-2 entry into A549 cells was clathrin - dependent , as previously reported in HeLa , C6/36 and BS - C-1 cells .
By contrast , DENV-2 entry into A549 cells was clathrin - dependent , as previously reported in HeLa , C6/36 and BS - C-1 cells .