Like the other very large viruses `` Mimivirus '' , `` Pithovirus '' and `` Megavirus '' , `` Pandoravirus '' infects amoebas , but its genome , containing 1.9 to 2.5 megabases of DNA , is twice as large as that of `` Megavirus '' , and it differs greatly from the other large viruses in appearance and in genome structure .
Like the other very large viruses `` Mimivirus '' , `` Pithovirus '' and `` Megavirus '' , `` Pandoravirus '' infects amoebas . Its genome , with 1.9 to 2.5 megabases of DNA , is twice as large as that of `` Megavirus '' .