FIG. 6.

Detection of proviral integrations of RCASBP(B)-bic in lymphomas and erythroblastosis tumors. High-molecular-weight DNA isolated from the tumor tissues (L, liver; K, kidney) of birds infected with RCASBP(A)-myc and RCASBP(B)-bic were digested with HindIII and subjected to Southern blot analysis using a radiolabeled bic exon 2a probe (see Fig. 1). The band of lower mobility represents the endogenous bic gene restriction fragment. Fragment sizes are indicated in kilobases.