Granzyme A in Human PBMCs. Granzyme A was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) using Goat Anti-Human Granzyme A Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2905) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (yellow; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Preparation and Storage
Sterile PBS to a final concentration of 0.2 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.
Background: Granzyme A
Granzyme A is a member of the granzyme family of the serine proteases found specifically in the cytotoxic granules of cytotoxic T lymphocytes (CTL) and natural killer (NK) cells. Granzyme A is the most abundant protease in CTL and NK cells. It induces caspase‑independent cell death when introduced into target cells by perforin (1). Human granzyme A is synthesized as a 262 amino acid (aa) precursor with a signal peptide (aa 1‑26), a propeptide (aa 27‑28) and a mature chain (aa 29‑262) (2). After being activated by lysyl endopeptidase removal of the propeptide, Granzyme A cleaves thioester substrates. Mature human granzyme A shares 71% amino acid sequence identity with mouse granzyme A.
Lieberman, J. and Z. Fan (2003) Curr. Opin. Immunol. 15:553.
Gershenfeld, H.K. et al. (1988) Proc. Natl. Acad. Sci. USA 85:1184.
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