TDS | SDS

The PC61.5 antibody is specific for mouse CD25, a 55 kDa surface protein also known as the Interleukin-2 Receptor alpha chain, or IL-2R alpha. CD25 may bind IL-2 by itself, although with low affinity and without induction of cell signaling. CD25 is also expressed within a high-affinity complex, along with the IL-2R beta chain (CD122) and the common gamma chain (CD132), to form a signaling receptor complex. Expression of CD25 varies during developmental stages of T and B cells, is induced on activated mature T and B cells, and is present on subsets of dendritic cells. CD25 signaling as part of the IL-2 receptor complex triggers T cell activation and proliferation, as well as modulating the differentiation and function of Th17 cells, T regulatory (Treg) cells, and dendritic cells.

The PC61.5 antibody is used as a marker for T cells, B cells and dendritic cell subsets. Expression of CD25, CD4 and the transcription factor Foxp3 is regarded as a phenotypic signature for Treg cells. As such, this antibody is widely used to distinguish Treg cells from naïve or conventional T cells which are CD25-. This clone has also been reported for depletion of Treg cells in vivo (use format suitable for functional assays).

Name	violetFluor™ 450 Anti-Mouse CD25 (PC61.5)
Cat. No.	75-0251
Alternative Names	Interleukin-2 Receptor alpha, IL-2Rα, Ly-43, p55, Tac
Gene ID	16184
Clone	PC61, PC61.5, 75-0251, 75-0251-U025, 75-0251-U100
Isotype	Rat IgG1, lambda
Reactivity	Mouse
Format	violetFluor™ 450
Application	Flow Cytometry

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