This is an antibody preparation generated in rabbit by Dr. William North Professor of Physiology and Neurobiology of Dartmouth Medical School (now Geisel School of Medicine at Dartmouth College) using vasopressin associated rat neurophysin protein purified by preparative electrophoresis as antigen.

Specificity:  Less than 1% cross-reactivity with Rat and Mouse Neurophysins 2 and 3 (Oxytocin-Associated Rat Neurophysins, OT-RNP), and 100% cross-reaction with rat Neurophysin 3 (OT-RNP’) and with Mouse Vasopressin-Associated Neurophysin.

Tested Applications                         IHC-formaldehyde fixed tissues, Flow cytometry , RIA, ELISA, Western


Form                                               Liquid

Storage Instructions                      Shipped at 4⁰C. Store at 4⁰C short term (1-2 weeks). Upon delivery aliquot and store at -20⁰C or   -80⁰C. Avoid freeze/Thaw cycling.

Storage buffer                                 Preservative none.  Stable if stored as 1:100 dilutions in PBS containing 1.25 mg/ml of BSA at -20⁰C.

                                                       Constituents: Whole serum

Purity                                              Whole Antiserum

Clonality                                         Polyclonal

Isotype                                            IgG, Behaves chromatographically like mouse IgG2B

Research Areas:                     Neuroscience, Endocrinology, Neuropeptides, Hormones, Neuroendocrinology, Measurement of Vasopressin Release.


Woomera Therapeutics Inc.  guarantees use of HK5 in each of the tested applications:

The application information recommends certain starting dilutions; however, optimal dilutions/concentrations should be determined by the end user.


IHC                                                 1:5000-1:10000, Use at an assay dependent concentration

RIA                                           1/20,000-1/30,000, Sensitivity to 20 pg, range 20-1280 pg; 50% displacement at 160 pg; <1% OT-RNP cross-reaction.

ELISA                                             1/10,000

Flow Cytometry                              1/1000

Western                                           1/1000


North, W.G., and Valtin, H.  The purification of rat neurophysins by a method of preparative polyacrylamide gel electrophoresis.  Analyt. Biochem. 78:436-450, 1977.

North, W.G., LaRochelle, F.T., Jr., and Hardy, G.R.  Radioimmunoassays for individual rat neurophysins.  J. Endocrinol. 96:373-386, 1983.

North, W.G., and Mitchell, T.I.  Evolution of neurophysin proteins:  Partial amino acid sequences of rat neurophysins.  FEBS Letters 126:41-44, 1981.

Fisher, A.W.F., Gill, V., Wong, K., Raghatvan, S., North, W., and Lederis, K.  Anatomical and developmental aspects of the neurons terminating in the posterior pituitary.  In: Neurosecretion: Molecules, Cells, Systems. D.S. Farner and K. Lederis (eds.) Plenum Publishing Corp. pp. 39-47, 1982.

Wong, K.W., Fisher, A., Lederis, K., and North, W.  The ontogeny of the oxytocin/neurophysin system of the Brattleboro rat.  Ann. N.Y. Acad. Sci. 394:177-182, 1982.

North, W.G., Gellai, M., and Hardy, G.  Oxytocin and oxytocin-associated neurophysin evaluation by RIA in the Brattleboro rat: Turnover.  Ann. N.Y. Acad. Sci. 394:167-172, 1982.

Cheng, S.W.T., and North, W.G.  Effects of acute increases in plasma osmolality on plasma vasopressin-associated neurophysin in conscious rats: implications for osmoregulation.  Neuroendocrin. 40:363-368, 1985.

Cheng, S.W.T., and North, W.G.  Function of vasopressinergic neurons in rats under conscious and anesthetized conditions.  Am. J. Physiol. 248:E155-E161, 1985.

Stern, J.E., Mitchell, T., Herzberg, V.L., and North, W.G.  Secretion of vasopressin, oxytocin and two neurophysins from rat hypothalamo-neurohypophyseal explants in organ culture.  Neuroendocrin., 43:252-258, 1986.

Gonzalez, C.B., Caorsi, C.E., North, W.G., and Berrios, O.T.  Purification of bovine neurosecretory granule membranes by density gradient centrifugation. Analytical Biochem. 157:316-322, 1986.

O'Connor, E.F., Cheng, S.W.T., and North, W.G.  Effects of intraperitoneal injection of lithium chloride on neurohypophyseal activity: implications for behavioral studies.  Physiology and Behavior 40:91-95, 1987.

Cheng, S.W.T., and North, W.G.  Reduced responsiveness to acute salt-loading of vasopressin-neurons and oxytocin-neurons in the heterozygous Brattleboro rat. Neuroendocrinol. 45:93-98, 1987.

Cheng, S.W.T., and North, W.G.  Vasopressin reduces release from vasopressin-neurons and oxytocin-neurons by acting on V2-like receptors. Brain Res. 479:35-39, 1989.

Cheng, S.W.T., O'Connor, E.F., and North, W.G.  Influence of opioid peptides on release from vasopressin and oxytocin neurones of the hypothalamoneurohypophyseal system:  Effects of naloxone in the conscious rat.  Can. J. Physiol. Pharmacol. 68:568-574, 1990.

Cheng, S.W.T., and North, W.G.  Influence of pentobarbital and urethane on release from magnocellular neurons.  Neuroendocrinology  54:482-487, 1991.

North, W.G., O'Connor, E.F., and Gonzalez, C.B.  Single-step isolation and sequencing of vasopressin and oxytocin precursors.  Peptides 13:395-400, 1992.

Friedmann, A.S., Memoli, V.A., Yu, X-M., and North, W.G.  Biosynthesis of vasopressin by gastrointestinal cells of Brattleboro and Long-Evans rats.  Peptides 14:607-612, 1993.

Product code:  HK76

Rabbit Vasopressin-Rat / Mouse Neurophysin Antibodies (HK76)

Rabbit Vasopressin-Rat / Mouse Neurophysin  Antibodies  (VP-RNP, RNP1) Antibodies  (HK 76)

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