association of satellite rna with cucumber mosaic virus (cmv) leads to either attenuation or enhancement of the viral symptoms. for detection of the satellite rnas in iranian isolates of cmv, plant samples showing viral symptoms were collected from different farms in the provinces of east- and west- azerbayjan and ardebil. these samples were inoculated onto the experimental host plants in green...

The small hydrophobic (SH) protein gene and flanking regions of the Urabe Am9 vaccine strain of mumps virus were amplified by the polymerase chain reaction and sequenced directly by the dideoxynucleotide chain termination method. The 434 bp sequence was identical for the Urabe strain isolated from vaccines produced by three manufacturers and for virus isolated following post-vaccination parotit...

One of the most efficient mechanisms by which plants protect themselves from invading virusesis the specific RNA-dependent silencing pathway termed post-transcriptional gene silencing(PTGS). In this mechanism, resistance to a virus is engineered through the expression of asegment of the virus genomein transgenic plants. Potato VirusY (PVY) is one of the mostdamaging viruses of potato, infecting...

DNA coding for the core antigen from hepatitis B Virus (HBcAg) was amplified, cloned and propagated in E. coli. The core protein was expressed in E. coli and the product was readily detected by Western blot. This protein can be used as a diagnostic material in serum screening tests. To increase the level of expression of this antigen in bacteria, two plasmids were constructed in which the gene ...

background and aims: each year, the influenza virus causes moderate to severe infections with a high prevalence throughout the world. accordingly, an influenza vaccine that ensures protection with only a single dose would be a much more cost effective approach to influenza prophylaxis. generation of influenza non-replicating virus-like particles (vlp) in baculoviral expression system is an attr...