OBSERVATIONS ON THE BIOLOGICAL BEHAVIOR OF TOBACCO MOSAIC VIRUS NUCLEIC ACID

The nucleic acids of some strains of tobacco mosaic virus.

Investigation of the protein compositions of highly purified preparation8 of eight strains of tobacco mosaic virus revealed that each strain possesses a characteristic composition which in several instances could be demonstrated to differ significantly from that of the other strains (1). The differences found consist mainly of altered proportions of certain amino acids, but it was also found th...

The Molecular Size and Shape of the Nucleic Acid of Tobacco Mosaic Virus

The asymmetric nucleoprotein of tobacco mosaic virus has a molecular weight of about 4 X lo7 (1) and approximate molecular dimensions of 150 A. X 2800 A. (2). 5 to 6 per cent of the virus is a ribosenucleic acid (3) which may be separated from the protein by many methods (4-8). A recent report by Schramm that the separation may also be effected by a nucleophosphatase derived from calf intestina...

The iron content of tobacco mosaic virus and some properties of its infectious nucleic acid.

llvidence for the occurrence of iron and certain other trace elements in purified preparations of tobacco mosaic virus has been presented by Loring and Waritz (1). A considerable variation in the iron content of the virus was found under different conditions, but in no case in which virus activity was retained was it possible to reduce the iron content to less than approximately 20 pg. per gm. ...

The nucleic acid of African Horse-Sickness Virus

Quantum yields for inactivation of tobacco mosaic virus nucleic acid by ultraviolet radiation (254 nm.).

The quantum yield, under non-photoreactivating conditions, for inactivation of tobacco mosaic virus RNA by ultraviolet radiation (254 nm.) is independent of the RNA concentration but varies appreciably with the ionic strength of the irradiation solvent, being approximately three times greater in water than in o-I M-potassium phosphate buffer. Photoreactivation of inactivated tobacco mosaic viru...