The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
Use a concentration of 1 µg/ml. Detects a band of approximately 35 kDa (predicted molecular weight: 31 kDa).
Use at an assay dependent concentration. PubMed: 24223903
Use a concentration of 10 µg/ml.
Use at an assay dependent concentration. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
Use at an assay dependent concentration.
Function: Involved in the activation cascade of caspases responsible for apoptosis execution. Might function by either activating some proteins required for cell death or inactivating proteins necessary for cell survival.
Tissue specificity: Expressed at higher levels in the embryonic lung, liver and kidney than in the heart and brain. In adults, higher level expression is seen in the placenta, lung, kidney, and pancreas than in the heart, brain, liver and skeletal muscle.
Similarity: Belongs to the peptidase C14A family.
Contains 1 CARD domain.
PTM: The mature protease can process its own propeptide, but not that of other caspases.
IHC image of Caspase-2 staining in human hippocampus FFPE section, performed on a Leica BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab2251, 5µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.
ICC/IF image of ab2251 stained A431 cells. The cells were 4% formaldehyde fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab2251, 10µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899, anti-rabbit DyLight® 488 used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.
Western blot - Anti-Caspase-2L antibody (ab2251)
All lanes : Anti-Caspase-2L antibody (ab2251) at 1 µg/ml
Lane 1 : Jurkat (Human T cell lymphoblast-like cell line) Whole Cell Lysate Lane 2 : HEK293 Human embryonic kidney cell line Whole Cell Lysate
Lysates/proteins at 20 µg per lane.
Secondary Goat Anti-Rabbit IgG H&L (HRP) (ab97051) at 1/10000 dilution Developed using the ECL technique
This blot was produced using a 4-12% Bis-tris gel under the MOPS buffer system. The gel was run at 200V for 50 minutes before being transferred onto a Nitrocellulose membrane at 30V for 70 minutes. The membrane was then blocked for an hour using 5% Bovine Serum Albumin before being incubated with ab2251 overnight at 4°C. Antibody binding was detected using an anti-rabbit antibody conjugated to HRP, and visualised using ECL development solution.
Caspase 2 was immunoprecipitated using 0.5mg Jurkat whole cell extract, 5µg of Rabbit polyclonal to Caspase 2 and 50µl of protein G magnetic beads (+). No antibody was added to the control (-). The antibody was incubated under agitation with Protein G beads for 10min, Jurkat whole cell extract lysate diluted in RIPA buffer was added to each sample and incubated for a further 10min under agitation. Proteins were eluted by addition of 40µl SDS loading buffer and incubated for 10min at 70oC; 10µl of each sample was separated on a SDS PAGE gel, transferred to a nitrocellulose membrane, blocked with 5% BSA and probed with ab2251. Secondary: Mouse monoclonal [SB62a] Secondary Antibody anti-Rabbit IgG light chain HRP (ab99697). Band: 35kDa: Caspase 2 .
Western blot - Anti-Caspase-2 antibody (ab2251)
Lane 1 : Marker Lanes 2 - 7 : Anti-Caspase-2L antibody (ab2251) at 1 µg/ml
Lane 1 : As above Lane 2 : HeLa (Human epithelial carcinoma cell line) Nuclear Lysate (ab27251) at 20 µg Lane 3 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate (ab27252) at 20 µg Lane 4 : A431 whole cell lysate (ab7909) at 20 µg Lane 5 : Jurkat whole cell lysate (ab7899) at 20 µg Lane 6 : HEK293 whole cell lysate (ab7902) at 20 µg Lane 7 : Recombinant Caspase 2 antibody at 10 µg