There were no differences in anti-HERV-K env su IgM (Figure 2A) and IgG (Figure 2B) levels between the normal-2, breast cancer and cervical cancer groups whereas the IgM (Figure 2A) and IgG (Figure 2B) levels of normal-1 group were significantly higher than those of the normal-2, breast cancer or cervical cancer groups. The gene discussed is CD40LG; the disease is breast cancer.