ELECTRON MICROSCOPIC STUDIES ON DNA FROM A DENSONUCLEOSIS VIRUS(YAMANASHI ISOLATE) OF THE SILKWORM, BOMBYX MORI
Abstract: Chemical properties of newly isolated Bombyx densonucleosis virus(BmDNV), Yamanashi isolate(Y-DNV), were found to be different from those of first isolated BmDNV, Ina isolate. The viral DNA of Y-DNV was resolved in an agarose gel electropherogram into two closely migrating bands, DNA Ⅰ and Ⅱ. The digests of these DNAs treated with some restriction enzymes differed clearly from each other. In order to clarify this phenomenon, the structure of these DNA molecules was investigated by electron microscopy. Both ...