Figure 5From: Effect of bee venom on IL-6, COX-2 and VEGF levels in polycystic ovarian syndrome induced in Wistar rats by estradiol valerateNegative and positive controls for COX-2 and VEGF. Negative controls were included in each experiment by incubating tissue sections with antibody dilution buffer instead of the primary antibody (antral follicle cells). Positive control slides consisted of rat hippocampus cells for COX-2 (left panel) and vessels of corpus luteum for VEGF (right panel).Back to article page