Cytokines play a critical role in supporting immune cell survival, differentiation, and maintenance. Whether you are working with T cells, B cells, NK cells, or any other immune cell type, Thermo Fisher Scientific offers an array of recombinant cytokines to support your cell culture needs. Our growth factor and cytokine selection includes IL-2, IL-7, IL-15, IL-21, Flt-3Ligand, and SCF and many more. 

Immune checkpoint proteins maintain self-tolerance and the duration of the immune response within localized tissues. These proteins are expressed on the surface of adaptive immune cells and can stimulate or inhibit the local immune response through binding with their associated ligand. Cancer cells exploit this process by expressing immune checkpoint proteins to exploit the natural immune response, creating a more favorable environment for tumor growth and survival. Thermo Fisher Scientific offers a large selection of immune checkpoint proteins to investigate these processes and how they can be exploited for potential therapeutics. Key immune checkpoint proteins include 4-1BBL, CTLA-4, PD-1, PD-L1, TIM-1, among many others.