Detection of Human CD161 in Human Lymphocytes Human peripheral blood lymphocytes were stained with Mouse Anti-Human CD4 APC-conjugated Monoclonal Antibody (Catalog # FAB3791A) and either (A) Mouse IgG2B Isotype control (Catalog # MAB0041) or (B) Mouse Anti-Human CD161 Monoclonal Antibody (Catalog # MAB7448) followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B).
Preparation and Storage
Sterile PBS to a final concentration of 0.5 mg/mL.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
CD161, also known as NKR-P1A and KLRB1, is a 40 kDa type II transmembrane glycoprotein that contains one C-type lectin domain in its extracellular region. CD161 is expressed as a disulfide-linked dimer on the surface of Th17 cells and NK cells as well as on subsets of CD1-restricted T cells, intestinal NT cells, peripheral memory T cells, monocytes, and dendritic cells. It binds to OCIL/CLEC2d, leading to an inhibition of NK cell-mediated cytotoxicity and IFN-g secretion. Alternatively, CD161 can enhance TCR activation to CD1d ligation. CD161+ cell populations are depleted in ulcerative colitis, Grave’s disease, and AIDS, although CD161+ T cells are activated during asthmatic attacks. Additional related proteins are expressed in mouse but not human: the inhibitory NKR‑P1B and D, and the stimulatory NKR‑P1A, C, and F. Human CD161 shares 47% aa sequence identity with mouse and rat NKR-P1A.
Entrez Gene IDs:
CD161 antigen; CD161; CLEC5B; CLEC5BC-type lectin domain family 5 member B; HNKR-P1a; killer cell lectin-like receptor subfamily B member 1; killer cell lectin-like receptor subfamily B, member 1; KLRB1; Ly59; Natural killer cell surface protein P1A; NKR; NKRP1; NKR-P1; NKRP1A; NKR-P1AMGC138614; NKRP1ANKR
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