Abstract
The use of colloidal gold-labeled rabbit antibody to a barley stripe mosaic virus-precipitating barley lectin isolated from barley seed showed that the lectin was distributed along the entire surface of the virus particle and not at the ends only. Upon standing, the specific activity of rabbit antilectin antibody labeled with colloidal gold was gradually lost by flocculation; it should be used within 1 wk after being labeled. The function of the carbohydrate portion of barley stripe mosaic virus protein remains to be elucidated.