Detection of Human LAMP2/CD107b by Western Blot.
Western blot shows lysates of JAR human choriocarcinoma cell line, JEG‑3 human epithelial choriocarcinoma cell line, and human placenta tissue. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). Specific bands were detected for LAMP2/CD107b at approximately 100-120 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
LAMP2/CD107b in HeLa Human Cell Line.
LAMP2/CD107b was detected in immersion fixed HeLa human cervical epithelial carcinoma cell line using Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to lysosomes. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.
Detection of LAMP-2A in HeLa Human Cell Line by Flow Cytometry.
HeLa human cervical epithelial carcinoma cell line was stained with Goat Anti-Human LAMP2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228, filled histogram) or control antibody (Catalog # AB‑108‑C, open histogram), followed by Allophycocyanin-conjugated Anti-Goat IgG Secondary Antibody (Catalog # F0108). To facilitate intracellular staining, cells were fixed with paraformaldehyde and permeabilized with saponin.
Western Blot Shows Human LAMP‑2/CD107b Specificity by Using Knockout Cell Line.
Western blot shows lysates of HeLa human cervical epithelial carcinoma parental cell line and LAMP-2/CD107b knockout HeLa cell line (KO). PVDF membrane was probed with 1 µg/mL of Goat Anti-Human LAMP‑2/CD107b Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6228) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for LAMP‑2/CD107b at approximately 100 kDa (as indicated) in the parental HeLa cell line, but is not detectable in knockout HeLa cell line. GAPDH (Catalog # AF5718) is shown as a loading control. This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
Sterile PBS to a final concentration of 0.2 mg/mL.
Reconstitution Buffer Available
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.
Lysosomal associated membrane protein 2 (LAMP2), also known as CD107b and LGP110, is an approximately 110 kDa transmembrane glycoprotein that is a major component of lysosomal membranes (1). Mature human LAMP2 consists of a 347 amino acid (aa) intralumenal domain, a 24 aa transmembrane segment, and a 35 aa cytoplasmic tail (2). Its lumenal domain is organized into two heavily N-glycosylated regions separated by a Ser/Pro-rich linker that carries a minor amount of O‑linked glycosylation (2, 3). Alternate splicing generates a human LAMP2 isoform (LAMP2B) with a substituted juxtamembrane lumenal region, transmembrane segment, and cytoplasmic tail (4). Within the lumenal domain, human LAMP2 shares approximately 64% aa sequence identity with mouse and rat LAMP2. LAMP2 itself is subject to lysosomal degradation following cleavage of its lumenal domain (5). It mediates the lysosomal uptake of the chaperone HSC73 in complex with cargo proteins and is required for the lysosomal destruction of autophagic vacuoles (6, 7). In cytotoxic T cells and mast cells, LAMP2 is expressed in the membranes of intracellular granules that contain effector molecules such as perforin, granzymes, eicosanoids, and histamine (8-10). Up‑regulated LAMP2 at the plasma membrane serves as an indicator of cell activation of CD8+ T cells, mast cells, monocytes, and platelets (9-12). LAMP2 is a native ligand for lectins Galectin-1 and Galectin-3 (13‑15).
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Lysosome-associated Membrane Glycoprotein 2
Entrez Gene IDs:
CD107 antigen-like family member B; CD107b antigen; CD107b; LAMP2; LAMP-2; LAMPB; LGP110; lysosomal-associated membrane protein 2; lysosome-associated membrane glycoprotein 2; Lysosome-associated membrane protein 2
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