Plant Viruses, Including Protophytal Viruses

Those viruses that have been identified as belonging to one of the groups approved by the ICTV will only be identified in that manner. Specific properties described in the literrature, particularly numerical ones such as molecular weights, may not agree exactly with those given for the type member or the general range describing the group. However, in view, of the uncertainty of all such values (except for the sequenced molecules), only gross deviations from group characteristics will be noted for individual viruses.