Functional distinction of two regions of human interleukin 6 important for signal transduction via gp130

Floris D. de Hon, Edwin ten Boekel, Jean Herrman, Claude Clement, Marc Ehlers, Tetsuya Taga, Kiyoshi Yasukawa, Yoshiyuki Ohsugi, Tadamitsu Kishimoto, Stefan Rose-John, John Wijdenes, Rob Kastelein, Lucien A. Aarden, Just P.J. Brakenhoff