Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Far785/MediaObjects/13075_2002_Article_775_Fig1_HTML.jpg)
Expansion of Vγ9/Vδ2 T lymphocytes from patients with active or inactive Behçet's disease and healthy control individuals in response to various phosphoantigens. The Vγ9/Vδ2 expansion factor (EF) was then calculated by dividing the absolute number of Vγ9/Vδ2 T cells in specifically stimulated cultures by the absolute number of Vγ9/Vδ2 T cells cultured in the absence of any antigen. DMAPP, dimethylallyl pyrophosphate; IPP, isopentenyl pyrophosphate; RIB, ribose 1-P; TUBAg, Mycobacterium tuberculosis related phosphorylated components; XYL, xylose 1-P.