levels of gamma 1 mrna and the percentage of spleen cells producing human gamma chain increased up to 50-fold after treatment with bacterial lipopolysaccharide ( a b-cell mitogen ) but not with concanavalin a ( a t-cell mitogen ) , suggesting b-cell-specific and regulated expression of the human gamma 1 heavy-chain gene .
C0086418
human
C0021756
t-cell mitogen