FIG. 1.

ASLV Env glycoprotein immunofluorescence staining by mc8C5-4 is specific for the SU domain and is subgroup A specific. Avian Df-1 cells were transfected with proviral plasmids RCASBP-A-AP (a and e), RCASBP-B-AP (b and f), RCASBP-C-AP (c and g), and RCANBP (d and h), expressing SU of subgroup SR-A, SR-B, Pr-C, and SR-A, respectively. At 48 posttransfection, duplicate samples of cells were acetone fixed for whole-cell immunofluorescence staining with either mc8C5 ascites or with rb-anti-A-tail.