Medchemexpress, HY-P7038 10ug IL-21, Human CAS: Recombinant Human Interleukin-21 is a class 1 cytokine, which is produced by activated CD4 + T cells. Recombinant Human Interleukin-21 stimulation of T cells, B cells and NK cells leads to enhanced proliferation and mature effector function. Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.