Characterization of Rice Tungro Bacilliform and Rice Tungro Spherical Viruses

Nucleic acids and proteins of rice tungro bacilliform virus (RTBV) and rice tungro spherical virus (RTSV) were analyzed by gel electrophoresis. RTSV contains single-stranded RNA of 3.7×10 6 Da and two major proteins of 24 and 23 kDa. RTBV contains circular double-stranded DNA of 8.3 kbp and a single major protein of 32 kDa. The RTBV-DNA is 2.1-2.3 μm in length and has two discontinuities, one in each of the two strands, having different polarities. Endonuclease cleavage sites in the RTBV-DNA molecule are mapped (...)