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Polyglutamic acid
Chemical compound / From Wikipedia, the free encyclopedia
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Polyglutamic acid (PGA) is a polymer of the amino acid glutamic acid (GA). Depending on where the individual monomers connect, PGA can be gamma PGA (poly-γ-glutamic acid, γ-PGA), the form where the peptide bonds are between the amino group of GA and the carboxyl group at the end of the GA side chain, or alpha PGA, the form where the alpha-carboxyl is used to form the peptide bond.
Quick Facts Names, Identifiers ...
![]() Gamma PGA | |
Names | |
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Systematic IUPAC name
Poly[imino[1-carboxy-4-oxo-1,4-butanediyl]] | |
Identifiers | |
ChemSpider |
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Properties | |
(C5H7NO3)n | |
Molar mass | variable |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Gamma PGA is formed by bacterial fermentation. It is a major constituent of the Japanese food nattō and has a wide range of uses.
Alpha PGA has been investigated as a drug delivery system.