The virus was ultrapurified from systemically infected papaya leaves using a slightly modified protocol (Gonsalves and Ishii, 1980) using 0.5 M potassium phosphate buffer containing 0.01 M EDTA (pH 7.5).
The virus wasultrapurified from systemically infectedpapaya leaves using a slightly modifiedprotocol (Gonsalves and Ishii, 1980) using 0.5M potassium phosphate buffer containing 0.01M EDTA (pH 7.5).