RT Journal Article SR Electronic(1) A1 Gourlay, R. N. A1 Garwes, D. J. A1 Bruce, Judy A1 Wyld, Sara G.YR 1973 T1 Further Studies on the Morphology and Composition of Mycoplasmatales Virus-laidlawii 2 JF Journal of General Virology, VO 18 IS 2 SP 127 OP 133 DO https://doi.org/10.1099/0022-1317-18-2-127 PB Microbiology Society, SN 1465-2099, AB SUMMARY Mycoplasmatales virus-laidlawii 2 (MV-L2) was purified by ammonium sulphate precipitation and by sucrose density gradient fractionation. Electron micrographs of virus showed predominantly spherical enveloped particles with a mean diameter of about 80 nm (range 52 to 125 nm). The envelope had a ‘unit membrane’ structure and was probably serologically dissimilar to the ‘unit membrane’ of the host Acholeplasma laidlawii. No obvious isometric or helical capsid was observed within the envelope. The nucleic acid appeared to be DNA., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-18-2-127