Infectious pancreatic necrosis (IPN) virus has been purified and some physicochemical properties of its nucleic acid and protein moieties have been determined. The buoyant density of the virus particle in CsCl is 1.35 g/ml; degraded particle banded at a density of 1.31 g/ml. The virus nucleic acid was found to be double-stranded, according to several different criteria, namely resistance to pancreatic RNase, low density in CsSO (1.615), sharp melting curve with a of 89 °C in hypotonic buffer, and base composition. In a sucrose gradient the bulk of the virus RNA banded as a single peak (14 S); a small part of the virus nucleic acid was found at the top of the gradient. By gel electrophoresis virus RNA was resolved into three peaks corresponding to double-stranded molecules with mol. wt. ranging from 2.85 × 10 to 2.55 × 10. Gel analysis of virus proteins revealed three polypeptides of mol. wt. 80, 50 and 30 × 10, representing respectively 3%, 68% and 29% of the total protein. On the basis of these results IPN virus appears to be related to some reo-like viruses, having a single protein shell and a single class of double-stranded RNA.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error