Interleukin-21 (IL-21) is a secreted protein which belongs to the IL-15 / IL-21 family.
Interleukin-21 / IL-21 belongs to a family of cytokines that bind to a composite receptor consisting of a private receptor (IL21R) and the common cytokine receptor gamma chain (gamma(C)).
Interleukin-21 / IL-21 impacts a number of cell types, including CD8+ memory T cells, NK cells and subsets of CD4 memory T cells.
The IL-21R is widely distributed on lympho-haematopoietic cells.
IL-21 is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation.
Its action generally enhances antigen-specific responses of immune cells.
IL-21 promotes the anti-tumor activity of CD8+ T-cells and NK cells.
IL-21 exerts its effect through binding to a specific type I cytokine receptor, IL-21R, which also contains the γ chain (γc) found in other cytokine receptors including IL-2, IL-4, IL-7, IL-9 and IL-15.
The IL-21/IL-21R interaction triggers a cascade of events which includes activation of the tyrosine kinases JAK1 and JAK3, followed by activation of the transcription factors STAT1 and STAT3.
特徴
This protein carries a human IgG1 Fc tag at the C-terminus, followed by an Avi tag (Avitag).
The protein has a calculated MW of 43.6 kDa.
The protein migrates as 50-55 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
仕様
容量：200ug
Source：Biotinylated Human IL-21, Fc,Avitag, premium grade (IL1-H82F7) is expressed from human 293 cells (HEK293). It contains AA Gln 30 - Ser 162 (Accession # Q9HBE4-1).
