DNA Analysis of Insect Iridescent Virus 6: Evidence for Circular Permutation and Terminal Redundancy

Abstract

DNA analysis of small insect iridovirus 6 was performed. Combined exonuclease-restriction endonuclease digestions revealed that all resulting fragments were degraded without preference for any one DNA fragment. Upon denaturation and reannealing of native linear Chilo iridescent virus DNA (158 × 10 6 daltons), duplex DNA circles of a smaller size (140 × 10 6 daltons) with protruding tails were formed.