Medchemexpress, HY-P7078 10ug IL-21, Mouse CAS: Recombinant Mouse Interleukin-21 is a regulatory cytokine thought to play a role in the transition between innate and adaptive immunity. 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.