Description Histamine is located in mast cells, endocrine cells of the gut, blood cells and in some cells of the peripheral and central nervous system. Histamine is a potent vasodilator when secreted by mast cells found in various tissues as a result of allergic hypersensitivity or inflammation. In the central nervous system, Histamine is putative neurotransmitter. In the brain, its highest content has been found in the hypothalamus and in certain areas of the mesencephalon. The Histamine antiserum has a sensitivity level capable of detecting the low level Histamine contents of the brain. The Histamine antiserum was quality control tested using standard immunohistochemical methods. The antiserum demonstrates strongly positive labeling of rat hypothalamus using indirect immunofluorescent and biotin/avidin-HRP techniques. Recommended primary dilution is 1/4000-1/6000 in PBS/0.3% Triton X-100 biotin/avidin-HRP Technique . All staining is blocked by preabsorption of the antiserum with Histamine conjugate. Cross reactivity experiments indicate no cross reactivity with L-histidine or L-histidine containing peptides such as LH-RH. Photo Description: IHC image of neurons staining for histamine in the rat hypothalamus. The tissue was fixed with 4% carbodimide in 0.05 M phosphate buffered saline, before being removed and prepared for vibratome sectioning. Floating sections were incubated at RT in 10% goat serum in PBS, before standard IHC procedure. Primary antibody was incubated at 1:5000 for 48 hours, goat anti-rabbit secondary was subsequently added for 1 hour after washing with PBS. Light microscopy staining was achieved with standard biotin-streptavidin/HRP procedure and DAB chromogen. The section was then mounted on slides with permount. Host: Rabbit Quantity / Volume: 100 µL State: Lyophilized Whole Serum Reacts With: Aplysia Californica (Sea Slug), Bee, Copepods (Crustacean), Crab, Drosophila (Fly), Drosophila Melanogaster (Fly), Flea, Fly, Fruit Fly, Locust, Marine, Monkey, Moth, Mouse, Pig, Pleurobranchaea Japonica (Sea Slug), Rat, Snail Availability: In Stock Alternate Names: anti-Histamine