Consistent with the increased numbers of T and B cell conjugates in Tac mice, an increased frequency and number of CD73+ GC B cells was seen in the spleens of Tac mice compared to CR mice as the infection progressed (Figures 4F–4I), and the expression of CD73 on these GC B cells was higher in Tac mice (Figure 4I). Here, NT5E is linked to infection.