AHP1299 specifically recognises the 29kDa integral membrane protein Aquaporin 2 (AQP2), when phosphorylated at Ser261.
AQP2 provides the plasma membranes of the renal collecting duct with a high permeability channel to enable the movement of water across an osmotic gradient, under hormonal regulation by vasopressin. In addition to the Ser256 phosphorylation site, studies have identified a novel phosphorylated Ser261 site on AQP2, which decreases in expression, in response to vasopressin.
Gene mutations in AQP2 result in hereditary nephrogenic diabetes insipidus in humans, and acquired diabetes insipidus can also occur through a decrease in the expression of the AQP2 gene, following lithium treatment. Expression of the AQP2 gene is increased during pregnancy and other conditions associated with water retention.
Species Cross-Reactivity
Target Species
Cross Reactivity
Bovine
Expected from Sequence
Chicken
Expected from Sequence
Dog
Expected from Sequence
Human
Expected from Sequence
Mouse
Expected from Sequence
Primate
Expected from Sequence
Application
This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visitwww.abdserotec.com/protocols.
Application Name
Yes
No
Not Determined
Suggested Dilution
ELISA
Flow Cytometry
Immunohistology - Frozen
Immunohistology - Paraffin
Immunoprecipitation
Western Blotting(1)
1/1000
(1)
For the detection of phosphoproteins, tyrosine phosphatase inhibitors such as 1mM Sodium Orthovanadate should be added to the sample buffer. Milk or other casein-based blocking solutions are not recommended as casein is a phosphoprotein and its use can result in high background.
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Western Blotting
AHP1299 detects bands of approximately 29kDa and 37kDa (glycosylated form) in rat kidney cell lysates.
Storage
Store at +4oC or at -20oC if preferred.
Storage in frost-free freezers is not recommended.
This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Shelf Life
12 months from date of despatch.
Antiserum Preparation
Antisera to rat aquaporin 2 were raised by repeated immunisations of rabbits with highly purified antigen. Purified IgG was prepared by affinity chromatography.
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