The monoclonal antibody 66E2 recognizes human heart fatty acid binding protein (H-FABP) of both natural and recombinant origing. The H-FABP protein is derived from the human FABP3 gene. FABPs are small intracellular proteins (~13-14 kDa) with a high degree of tissue specificity that bind long chain fatty acids. They are abundantly present in various cell types and play an important role in the intracellular utilization of fatty acids, transport and metabolism. There are at least nine distinct types of FABP, each showing a specific pattern of tissue expression. Due to its small size, FABP leaks rapidly out of ischemically damaged necrotic cells leading to a rise in serum levels. Ischemically damaged tissues are characterized histologically by absence (or low presence) of FABP facilitating recognition of such areas. H-FABP is localized in the heart, skeletal and smooth muscle, mammary epithelial cells, aorta, distal tubules of the kidney, lung, brain, placenta, and ovary. The monoclonal antibody 66E2 stains heart muscle cells and striated skeletal muscle cells in immunohistology. It can be used to detect ischemia areas of human heart. It is also useful as marker for brain damage. Furthermore, this antibody is useful for the purification of H-FABP.
Frozen sections, Immuno assays, Immuno precipitation, Western blot
IP: Biotinylated 66E2 was immobilized on streptavidin beads and added to serum to immunoprecipitate H-FABP (Ref.5).
W: Reduced sample treatment. The band size is ~15 kDa (Ref.4). 1μg/ml was used (Ref.6).
F: Permeabilization was done in cold acetone with 0.5% hydrogen peroxidase for 10 min, after drying and washing, antibodies were incubated for 30 minutes.
Dilutions to be used depend on detection system applied. It is recommended that users test the reagent and determine their own optimal dilutions. The typical starting working dilution is 1:50.
Heart cells or recombinant H-FABP