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Phosphatases / Related Products
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ALX-350-014 Revised 03-Apr-08
Calyculin A
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PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Natural Products - Other Signal Transduction Pathway Modulators
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-350-014-C010   10 µg 65.00 USD Add To Cart
ALX-350-014-C025   25 µg 110.00 USD Add To Cart
ALX-350-014-C050   50 µg 190.00 USD Add To Cart
ALX-350-014-C100   100 µg 320.00 USD Add To Cart
Product Specification
FORMULA: C50H81N4O15P
MW: 1009.2
CAS NUMBER: 101932-71-2
SOURCE/HOST: Isolated from Discodermia calyx.
PURITY: ≥95%
APPEARANCE: Lyophilized.
SOLUBILITY: Soluble in DMSO, 100% ethanol, methanol, acetonitrile, chloroform, methylene chloride or benzene. Insoluble in water.
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
USE/STABILITY: May by subject to isomerization when in solution. Biological activity is not affected by isomerization.
HANDLING: Protect from light and moisture.
HAZARD: TOXIC. MAY BE CARCINOGENIC.

Product Description
Potent cell permeable inhibitor with high specificity for protein phosphatase 1 (PP1) and 2A (PP2A). Inhibits p130cas tyrosine phosphorylation. Enhances the phosphorylation level of NF-κB. Affects intracellular signalling processes that require 14-3-3. Potent non-phorbol type tumor promoter. Prevents γ-radiation induced apoptosis.
Product Specific Literature References
Okadaic acid: an additional non-phorbol-12-tetradecanoate-13-acetate- type tumor promoter: M. Suganuma, et al.; PNAS 85, 1768 (1988) Abstract
Protein phosphatases come of age: P.Cohen & P.T. Cohen; J. Biol. Chem. 264, 21435 (1989) Abstract; Full Text
Calyculin A and okadaic acid: inhibitors of protein phosphatase activity: H. Ishihara, et al.; BBRC 159, 871 (1989) Abstract
The structure and regulation of protein phosphatases: P. Cohen; Ann. Rev. Biochem. 58, 453 (1989) Abstract
Calyculin A, an inhibitor of protein phosphatases, a potent tumor promoter on CD-1 mouse skin: M. Suganuma, et al.; Cancer Res. 50, 3521 (1990) Abstract
Nonphorbol tumor promoters okadaic acid and calyculin-A induce membrane translocation of protein kinase C: R. Gopalakrishna; BBRC 189, 950 (1992) Abstract
Comparative effects of protein phosphatase inhibitors (okadaic acid and calyculin A) on human leukemia HL60, HL60/ADR and K562 cells: K. Sakurada, et al.; BBRC 187, 488 (1992) Abstract
Calyculin A, a potent inhibitor of phosphatases-1 and -2A, prevents apoptosis: Q. Song & M.F. Lavin; BBRC 190, 47 (1993) Abstract
Enhancement of AMPA-mediated synaptic transmission by the protein phosphatase inhibitor calyculin A in rat hippocampal slices: A. Figurov, et al.; Eur. J. Neurosci. 5, 1035 (1993) Abstract
Calyculin A, a non-phorbol ester type tumor promotor, induced oxidative DNA damage in stimulated human neutrophil-like cells: T. Takeuchi, et al.; BBRC 205, 1803 (1994) Abstract
Potassium and calcium channel involvement in induction of long-lasting synaptic enhancement by calyculin A, a protein phosphatase inhibitor, in rat hippocampal CA1 region: N. Murakami, et al.; Neurosci. Lett. 176, 181 (1994) Abstract
Differential toxicity of the protein phosphatase inhibitors microcystin and calyculin A: M.T. Runnegar, et al.; J. Pharmacol. Exp. Ther. 273, 545 (1995) Abstract
Inhibition of p130cas tyrosine phosphorylation by calyculin A: W. Qiu, et al.; J. Leukoc. Biol. 63, 631 (1998) Abstract
Unique features of the okadaic acid activity class of tumor promoters: H. Fujiki & M. Suganuma; J. Cancer Res. Clin. Oncol. 125, 150 (1999), Review Abstract
Calyculin A-induced vimentin phosphorylation sequesters 14-3-3 and displaces other 14-3-3 partners in vivo: G. Tzivion, et al.; J. Biol. Chem. 275, 29772 (2000) Abstract
Calyculin A induces apoptosis and stimulates phosphorylation of p65NF-kappaB in human osteoblastic osteosarcoma MG63 cells: H. Tanaka, et al.; Int. J. Oncol. 31, 389 (2007) Abstract
 
 
ALX-270-062 Revised 03-Feb-05
Cantharidic acid . disodium salt
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PRODUCT LINE Signal Transduction
PRODUCT CATEGORY PP2A / Related Products
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ALX-270-062-M010   10 mg 110.00 USD Add To Cart
Product Specification
FORMULA: C10H12O5 . 2Na
MW: 212.2 . 46.0
CAS NUMBER: 28874-45-5
PURITY: ≥95%
APPEARANCE: White solid.
SOLUBILITY: Soluble in water; slightly soluble in DMSO.
SHIPPING: AMBIENT
LONG TERM STORAGE: +4°C

Product Description
Potent protein phosphatase 2A inhibitor.
Product Specific Literature References
M. Matsuzawa, et al.; J. Agric. Food Chem. 35, 823 (1987)
Partial characterization of specific cantharidin binding sites in mouse tissues: M.J. Graziano, et al.; Mol. Pharmacol. 33, 706 (1989) Abstract
Cantharidin-binding protein: identification as protein phosphatase 2A: Y.-M. Li & J.E. Casida; PNAS 89, 11867 (1992) Abstract
 
 
ALX-270-063 Revised 03-Apr-08
Cantharidin
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SYNONYMS Hexahydro-3a,7a-dimethyl-4,7-epoxyisobenzo-furan-1,3-dione
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Natural Products - Other Signal Transduction Pathway Modulators
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Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-270-063-M025   25 mg 50.00 USD Add To Cart
ALX-270-063-M100   100 mg 160.00 USD Add To Cart
Product Specification
FORMULA: C10H12O4
MW: 196.2
CAS NUMBER: 56-25-7
MERCK INDEX: 14: 1752
PURITY: ≥98%
APPEARANCE: White to off-white solid.
SOLUBILITY: Soluble in acetone, DMSO or 100% ethanol.
SHIPPING: AMBIENT
LONG TERM STORAGE: +20°C
HANDLING: Protect from light.
HAZARD: TOXIC.

Product Description
Potent protein phosphatase 2A (PP2A) inhibitor. At higher concentrations, also inhibits protein phosphatase 1 (PP1).
Product Specific Literature References
Partial characterization of specific cantharidin binding sites in mouse tissues: M.J. Graziano, et al.; Mol. Pharmacol. 33, 706 (1988) Abstract
Cantharidin-binding protein: identification as protein phosphatase 2A: Y.-M. Li and J.E. Casida; PNAS 89, 11867 (1992) Abstract
Protein phosphatase 2A and its [3H]cantharidin/[3H]endothall thioanhydride binding site. Inhibitor specificity of cantharidin and ATP analogues: Y.-M. Li, et al.; Biochem. Pharmacol. 46, 1435 (1993) Abstract
Further Categories Containing This Product:
PP2A / Related Products
 
 
ALX-380-065 Revised 24-Sep-08
Fostriecin
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SYNONYMS Phosphotrienin
CI-920
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Antibiotics - Topoisomerase Inhibitors
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ALX-380-065-C010   10 µg 150.00 USD Add To Cart
Product Specification
FORMULA: C19H26O9PNa
MW: 452.4
CAS NUMBER: 87860-39-7
RTECS: UQ0600000
SOURCE/HOST: Isolated from Streptomyces pulveraceous subsp. fostreus.
PURITY: ≥98% (HPLC)
APPEARANCE: Colorless solid.
SOLUBILITY: Soluble in water (50mg/ml), methanol (10mg/ml) or 100% ethanol (10mg/ml).
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
USE/STABILITY: Stable for at least 1 year when stored at -20°C. Use fresh solution.
HANDLING: Protect from light. Packaged under inert gas. Hygroscopic.

Product Description
Antitumor antibiotic. Catalytic inhibitor of topoisomerase II. Strong protein phosphatase 2A (PP2A) inhibitor (IC50=3.2nM). Weak inhibitor for PP1 (IC50=131µM). No apparent effect on PP2B. The binding site for fostriecin on PP2A is different from that of okadaic acid (see Prod. No. ALX-350-003).
Product Specific Literature References
Novel antitumor agents CI-920, PD 113,270 and PD 113,271. II. Isolation and characterization: S.S. Stampwala, et al.; J. Antibiot. (Tokyo) 36, 1601 (1983) Abstract
Novel antitumor agents CI-920, PD 113,270 and PD 113,271. I. Taxonomy, fermentation and biological properties: J.B. Tunac, et al.; J. Antibiot. (Tokyo) 36, 1595 (1983) Abstract
Studies on the biochemical mechanism of the novel antitumor agent, CI- 920: D.W. Fry, et al.; Cancer Chemother. Pharmacol. 13, 171 (1984) Abstract
Anticancer activity of the structurally novel antibiotic Cl-920 and its analogues: W.R. Leopold, et al.; Cancer Res. 44, 1928 (1984) Abstract
Inhibition of type II topoisomerase by fostriecin: T.J. Boritzki, et al.; Biochem. Pharmacol. 37, 4063 (1988) Abstract
Comparison of effects of fostriecin, novobiocin, and camptothecin, inhibitors of DNA topoisomerases, on DNA replication and repair in human cells: C.M. Gedik & A.R. Collins; Nucl. Acids Res. 18, 1007 (1990) Abstract
The cell cycle related differences in susceptibility of HL-60 cells to apoptosis induced by various antitumor agents: W. Gorczyca, et al.; Cancer Res. 53, 3186 (1993) Abstract
Induction of DNA strand breaks associated with apoptosis during treatment of leukemias: W. Gorczyca, et al.; Leukemia 7, 659 (1993) Abstract
Antitumor drug fostriecin inhibits the mitotic entry checkpoint and protein phosphatases 1 and 2A: M. Roberge, et al.; Cancer Res. 54, 6115 (1994) Abstract
Fostriecin: a review of the preclinical data: R.S. de Jong, et al.; Anticancer Drugs 8, 413 (1997) Abstract
Fostriecin, an antitumor antibiotic with inhibitory activity against serine/threonine protein phosphatases types 1 (PP1) and 2A (PP2A), is highly selective for PP2A: A.H. Walsh, et al.; FEBS Lett. 416, 230 (1997) Abstract
Fostriecin, an inhibitor of protein phosphatase 2A, limits myocardial infarct size even when administered after onset of ischemia: C. Weinbrenner, et al.; Circulation 98, 899 (1998) Abstract
Phase I and pharmacokinetic study of the topoisomerase II catalytic inhibitor fostriecin: R.S. de Jong, et al.; Br. J. Cancer 79, 882 (1999) Abstract
Fostriecin: chemistry and biology: D.S. Lewy, et al.; Curr. Med. Chem. 9, 2005 (2002) Abstract
 
 
ALX-350-003 Revised 23-May-08
Okadaic acid (high purity)
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SYNONYMS Halochondrine A (high purity)
9,10-Deepithio-9,10-didehydroacanthifolicin (high purity)
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Okadaic Acids
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-350-003-C025   25 µg 60.00 USD Add To Cart
ALX-350-003-C050   50 µg 110.00 USD Add To Cart
ALX-350-003-C100   100 µg 180.00 USD Add To Cart
ALX-350-003-M001   1 mg 990.00 USD Add To Cart
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Product Specification
FORMULA: C44H68O13
MW: 805.0
CAS NUMBER: 78111-17-8
MERCK INDEX: 14: 6819
RTECS: AA8227800
SOURCE/HOST: Isolated from Prorocentrum concavum by preparative flash, medium pressure and high performance liquid chromatography.
PURITY: ≥98% (HPLC)
APPEARANCE: White crystalline solid.
SOLUBILITY: Soluble in DMSO, 100% ethanol or methanol (1mg/ml).
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
USE/STABILITY: Use only fresh solutions.
HANDLING: Protect from light. Packaged under inert gas.
HAZARD: MAY BE CARCINOGENIC. HIGHLY IRRITANT. TOXIC.

Product Description
Potent inhibitor of protein phosphatases 1 (PP1) and 2A (PP2A) in numerous cell types. Does not affect activity of acid phosphatase, alkaline phosphatase and tyrosine phosphatase. Non-phorbol type tumor promoter. Induces apoptosis in human breast carcinoma cells (MB-231 and MCF-7) and in myeloid cells, but inhibits glucocorticoid-induced apoptosis in T cell hybridomas. Tumor promoter. Has shown contractile effect on smooth muscle and heart muscle. Significantly increases cyclin B1 expression in adult neurons.
Product Specific Literature References
Okadaic acid: an additional non-phorbol-12-tetradecanoate-13-acetate- type tumor promoter: M. Suganuma, et al.; PNAS 85, 1768 (1988) Abstract
Protein phosphatases come of age: P. Cohen & P.T.W. Cohen; J. Biol. Chem. 264, 21435 (1989) Abstract; Full Text
The structure and regulation of protein phosphatases: P. Cohen; Ann. Rev. Biochem. 58, 453 (1989) Abstract
Effects of the tumour promoter okadaic acid on intracellular protein phosphorylation and metabolism: T.A. Haystead, et al.; Nature 337, 78 (1989) Abstract
Okadaic acid: a new probe for the study of cellular regulation: P. Cohen, et al.; TIPS 15, 98 (1990), (Review) Abstract
Nonphorbol tumor promoters okadaic acid and calyculin-A induce membrane translocation of protein kinase C: R. Gopalakrishna, et al.; BBRC 189, 950 (1992) Abstract
Protein phosphatase inhibitors okadaic acid and calyculin A alter cell shape and F-actin distribution and inhibit stimulus-dependent increases in cytoskeletal actin of human neutrophils: P. Kreienbuehl, et al.; Blood 80, 2911 (1992) Abstract
Site-specific dephosphorylation of smooth muscle myosin light chain kinase by protein phosphatases 1 and 2A: M. Nomura, et al.; Biochemistry 31, 11915 (1992) Abstract
Inhibition of apoptosis in human tumour cells by okadaic acid: Q. Song, et al.; J. Cell Physiol. 153, 550 (1992) Abstract
Okadaic acid enhances human T cell activation and phosphorylation of an internal substrate induced by phorbol myristate acetate: Y. Tada, et al.; Immunopharmacol. 24, 17 (1992) Abstract
Okadaic acid inhibits glucocorticoid-induced apoptosis in T cell hybridomas at its late stage: Y. Ohoka, et al.; BBRC 197, 916 (1993) Abstract
Multiple apoptotic death types triggered through activation of separate pathways by cAMP and inhibitors of protein phosphatases in one (IPC leukemia) cell line: B.T. Gjertsen, et al.; J. Cell. Sci. 107, 3363 (1994) Abstract
Differential induction of apoptosis in human breast tumor cells by okadaic acid and related inhibitors of protein phosphatases 1 and 2A: K. Kiguchi, et al.; Cell Growth Differentiation 5, 995 (1994) Abstract
Unique features of the okadaic acid activity class of tumor promoters: H. Fujiki & M. Suganuma; J. Cancer Res. Clin. Oncol. 125, 150 (1999), Review Abstract
Okadaic acid: the archetypal serine/threonine protein phosphatase inhibitor: A.B. Dounay & C.J. Forsyth; Curr. Med. Chem. 9, 1939 (2002), Review Abstract
Mechanism of Ca2+-mediated regulation of NDR protein kinase through autophosphorylation and phosphorylation by an upstream kinase: R. Tamaskovic, et al.; J. Biol. Chem. 278, 6710 (2003) Abstract; Full Text
Okadaic acid induced cyclin B1 expression and mitotic catastrophe in rat cortex: B. Chen, et al.; Neurosci. Lett. 406, 178 (2006) Abstract
 
 
ALX-350-010 Revised 02-Apr-08
Okadaic acid . ammonium salt (high purity)
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SYNONYMS Halochondrine A . Na (high purity)
9,10-Deepithio-9,10-didehydroacanthifolicin . Na (high purity)
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Okadaic Acids
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-350-010-C025   25 µg 55.00 USD Add To Cart
ALX-350-010-C100   100 µg 145.00 USD Add To Cart
ALX-350-010-M001   1 mg 980.00 USD Add To Cart
Product Specification
FORMULA: C44H67O13 . NH4
MW: 804.0 . 18.0
CAS NUMBER: 155716-06-6
SOURCE/HOST: Isolated from Prorocentrum concavum by preparative flash, medium pressure and high performance liquid chromatography. Salt form generated in aqueous ammonium hydroxide-methanol solution.
PURITY: ≥98% (HPLC)
APPEARANCE: White to off-white solid.
SOLUBILITY: Soluble in DMSO, 100% ethanol, methanol, acetone, ethyl acetate or distilled water. Dissolve first in organic solvent before diluting in water.
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
HANDLING: Packaged under inert gas. Protect from light.
HAZARD: TOXIC. MAY BE CARCINOGENIC. HIGHLY IRRITANT.

Product Description
Salt form of okadaic acid (Prod. No. ALX-350-003), with slightly greater stability than the free acid after it is put into stock solution (in organic solvents). Potent inhibitor of protein phosphatase 1 (PP1) and 2A (PP2A). Potent tumor promotor and neurotoxin.
 
 
ALX-350-011 Revised 10-Apr-08
Okadaic acid . sodium salt (high purity)
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SYNONYMS Halochondrine A . sodium salt (high purity)
9,10-Deepithio-9,10-didehydroacanthifolicin . sodium salt (high purity)
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Okadaic Acids
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-350-011-C025   25 µg 58.00 USD Add To Cart
ALX-350-011-C100   100 µg 160.00 USD Add To Cart
ALX-350-011-M001   1 mg 980.00 USD Add To Cart
Product Specification
FORMULA: C44H67O13 . Na
MW: 804.0 . 23.0
CAS NUMBER: 209266-80-8
SOURCE/HOST: Isolated from Prorocentrum concavum by preparative flash, medium pressure and high performance liquid chromatography. Salt form generated in aqueous sodium hydroxide-methanol solution.
PURITY: ≥98% (HPLC)
APPEARANCE: White to off-white solid.
SOLUBILITY: Soluble in DMSO (1mg/ml), 100% ethanol, methanol, acetone, ethyl acetate or distilled water. Dissolve first in organic solvent before diluting in water. 
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
HANDLING: Protect from light.
HAZARD: HIGHLY IRRITANT. MAY BE CARCINOGENIC. TOXIC.

Product Description
Salt form of okadaic acid (Prod. No. ALX-350-003), with slightly greater stability than the free acid after it is put into stock solution (in organic solvents). Potent inhibitor of protein phosphatase 1 (PP1) and 2A (PP2A). Potent tumor promotor and neurotoxin.
 
 
ALX-350-063 Revised 22-Aug-08
Okadaic acid . potassium salt (high purity)
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SYNONYMS Halochondrine A . K (high purity)
9,10-Deepithio-9,10-didehydroacanthifolicin . K (high purity)
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Okadaic Acids
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-350-063-C050   50 µg 90.00 USD Add To Cart
ALX-350-063-C100   100 µg 140.00 USD Add To Cart