interleukin-6 ( il-6 ) is a pleiotropic lymphokine active as a growth factor on b-cell hybridomas and plasmacytomas and found to be identical with b-cell stimulatory factor 2 , interferon beta 2 , 26-kd protein , and hepatocytes stimulating factor .
C0004561
b-cell
C0032131
plasmacytomas