Expressions of HERV-K Env and HERV-R Env proteins according to clinical factors. (A) Expressions of HERV-K Env and HERV-R Env proteins according to age group. (B) Expressions of HERV-K Env and HERV-R Env proteins according to the survival prognosis. (C) Expressions of HERV-K Env and HERV-R Env proteins according to gender. (D) Expressions of HERV-K Env and HERV-R Env proteins according to the stage of the tumor. (E) Expressions of HERV-K Env and HERV-R Env proteins according to other factors including differentiation, cancer type, and other markers or characteristics. The expression patterns of HERV-K Env and HERV-R Env proteins were compared based on the degree of differentiation in the liver, eso-phagus, and stomach cancer. The expression patterns of HERV-K Env and HERV-R Env proteins were also compared based on capsule involvement, tumor markers, and residual type in kidney cancer, breast cancer, and prostate cancer, respectively. (F) The expression patterns of HERV-K Env and HERV-R Env proteins were compared based on the tumor type in liver cancer, stomach cancer, ovarian cancer, kidney cancer, osteosarcoma, and esophagus cancer. Relative expressions of HERV-K Env and HERV-R Env were compared with the expressions in the surrounding normal tissues (% Normal).