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[D-Asp3]microcystin-LR

 
ALX-350-173-C025 25 µg 197.00 USD
 
ALX-350-173-C100 100 µg 427.00 USD
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Isolated from Microcystis aeruginosa. Microcystin containing a leucine (L) in position 2 and arginine (R) in position 4. Additionally, the D-MeAsp at position 3 is demethylated to Asp. Hepatotoxic.

Product Specification

Alternative Name:Microcystin-LR (desmethylated)
 
Formula:C48H72N10O12
 
MW:981.1
 
Source:Isolated from Microcystis aeruginosa.
 
Purity:≥95% (HPLC)
 
Identity:Identity determined by MS.
 
Appearance:White to off-white powder or oily film adhered to inside of the vial.
 
Solubility:Soluble in methanol or DMSO.
 
Shipping:Ambient
 
Long Term Storage:-20°C
 
Handling:For maximum product recovery after thawing, centrifuge the vial before opening the cap.
 
Scientific Background:Microcystins are a group of cyclic heptapeptide hepatotoxins produced by a number of cyanobacterial genera. The most notable of which, and namesake, is the widespread genus Microcystis. Structurally, all microcystins consist of the generalized structure cyclo(-D-Ala1-X2-D-MeAsp3-Y4-Adda5-D-Glu6-Mdha7-). X and Y are variable L-amino acids, D-MeAsp is D-erythro-β-methylaspartic acid and Mdha is N-methyldehydroalanine. Adda is the cyanobacteria unique C20 β-amino acid 3-amino-9-methoxy-2,6,8-trimethyl-10-phenyl-deca-4,6-dienoic acid. Substitutions of the variable L-amino acids at positions 2 and 4 give rise to at least 21 known primary microcystin analogs and alterations in the other constituent amino acids result in more than 90 reported mycrocystins to date.
 
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Product Literature References

Development and single-laboratory validation of a UHPLC-MS/MS method for quantitation of microcystins and nodularin in natural water, cyanobacteria, shellfish and algal supplement tablet powders: A.D. Turner, et al.; J. Chromatogr. B Analyt. Technol. Biomed. Life Sci. 1074-1075, 111 (2018), Abstract;
First observation of microcystin- and anatoxin-a-producing cyanobacteria in the easternmost part of the Gulf of Finland (the Baltic Sea): E. Chernova, et al.; Toxion 157, 18 (2018), Abstract;
Hepatotoxic Microcystin Removal Using Pumice Embedded Monolithic Composite Cryogel as an Alternative Water Treatment Method: F. Gurbuz, et al.; Water Res. 90, 337 (2016), Application(s): Injection, Abstract;
Development of an analytical method for the unambiguous structure elucidation of cyclic peptides with special appliance for hepatotoxic desmethylated microcystins: T. Kruger, et al.; Toxicon 54, 302 (2009), Abstract;

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