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C57Bl/6 splenocytes were stained with 0.125 ug APC Anti-Mouse CD4 (20-0042) (solid line) or 0.125 ug APC Rat IgG2a isotype control (dashed line).

APC Anti-Mouse CD4 (RM4-5)

SKU 20-0042-U025
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The RM4-5 antibody reacts with mouse CD4, a 55 kDa protein which acts as a co-receptor for the T cell receptor (TCR) in its interaction with MHC Class II molecules on antigen-presenting cells. The extracellular domain of CD4 binds to the beta-2 domain of MHC Class II, while its cytoplasmic tail provides a binding site for the tyrosine kinase lck, facilitating the signaling cascade that initiates T cell activation. CD4 is typically expressed on thymocytes, certain mature T cell populations such as Th17 and T regulatory (Treg) cells, as well as on dendritic cells.

The RM4-5 antibody is widely used as a phenotypic marker for CD4 expression. If used together, the RM4-5 antibody and an alternative antibody, Anti-Mouse CD4 clone GK1.5, will “compete” for binding, i.e. RM4-5 antibody is able to block GK1.5 antibody binding to cells. In contrast, RM4-5 antibody does not block the binding of Anti-Mouse CD4 clone RM4-4 to cells.


Recent Publications:

Hong H, Lee J, Park GY, Kim S, Park J, Park JS, Song Y, Lee S, Kim TJ, Lee YJ, Roh TY, Kwok SK, Kim SW, Tan Q, Lee Y. Postnatal regulation of B-1a cell development and survival by the CIC-PER2-BHLHE41 axis. Cell Rep. 2022 Feb 15;38(7):110386. doi: 10.1016/j.celrep.2022.110386. PMID: 35172136.

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Castillo-González R, Cibrian D, Fernández-Gallego N, Ramírez-Huesca M, Saiz ML, Navarro MN, Fresno M, Fuente H, Sánchez-Madrid F. Galectin-1 expression in CD8+ T lymphocytes controls inflammation in contact hypersensitivity. J Invest Dermatol. 2020 Nov 9:S0022-202X(20)32281-8. doi: 10.1016/j.jid.2020.10.020. PMID: 33181141.

» View on ScienceDirect

Name APC Anti-Mouse CD4 (RM4-5)
Cat. No. 20-0042
Alternative Names L3T4, T4
Gene ID 12504
Clone RM4-5
Isotype Rat IgG2a, κ
Reactivity Mouse
Format APC
Application Flow Cytometry
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