Anti-Mouse Ly-49D Alexa Fluor® 647 (Discontinued; refer to Cat. No. 17-5782)

Description: The monoclonal antibody eBio4E5 (4E5) reacts with Ly-49D, an activating member of the Ly-49 family of NK cell receptors. This family of receptors form homodimers that recognize MHC Class I molecules. The activating Ly-49 receptors (Ly-49D and Ly-49H) do not contain immune receptor tyrosine-based inhibitory motifs (ITIM) in their cytoplasmic domains, distinguishing them from the inhibitory Ly-49 family members. Instead, activating Ly-49 molecules have been shown to associate with DAP12 which contains an immunoreceptor tyrosine-based activation motif (ITAM) that is required for positive signaling. Expression of different Ly-49 family members is not linked, therefore, several Ly-49 proteins can be expressed on the same cells. Expression of Ly-49D on subsets of NK cells is strain-dependent and is found in C57BL/6, CB6F1 and SJL mice, while BALB/c, DBA/2, AKR and CBA/J mice are negative for Ly-49D. In 129/J mice, eBio4E5 also recognizes Ly-49O, Ly-49V and Ly-49R. eBio4E5 is reported to have functional (activating) activity.

References: Hart G, Flaishon L, Becker-Herman S, Shachar I. Ly49D receptor expressed on immature B cells regulates their IFN-gamma secretion, actin polymerization, and homing. J Immunol. 2003 Nov 1;171(9):4630-8. (4E5, FC, FA (activating), Pubmed)

Makrigiannis AP, Pau AT, Saleh A, Winkler-Pickett R, Ortaldo JR, Anderson SK. Class I MHC-binding characteristics of the 129/J Ly49 repertoire. J Immunol. 2001 Apr 15;166(8):5034-43. (4E5, FC and IP, Pubmed)

Ortaldo JR, Winkler-Pickett R, Mason AT, Mason LH. The Ly-49 family: regulation of cytotoxicity and cytokine production in murine CD3+ cells. J Immunol. 1998 Feb 1;160(3):1158-65.

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Yokoyama WM, Seaman WE. The Ly-49 and NKR-P1 gene families encoding lectin-like receptors on natural killer cells: the NK gene complex. Annu Rev Immunol. 1993;11:613-35.