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Pectic acid

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Pectic acid
Names
Other names Pectate; Poly(1,4-α-D-galacturonate); α-D-Polygalacturonic acid
Identifiers
CAS Number
UNII
Properties
Chemical formula (C6H8O6)n
Molar mass Variable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkverify (what is  ?) Infobox references
Chemical compound

Pectic acid, also known as polygalacturonic acid, is a water-soluble, transparent gelatinous acid existing in over-ripe fruit and some vegetables. It is a product of pectin degradation in plants, and is produced via the interaction between pectinase and pectin (the latter being common in the wine-making industry.) In the early stage of development of fruits, the pectic substance is a water-insoluble protopectin which is converted into pectin by the enzyme protopectinase during ripening of fruit. In over-ripe fruits, due to the presence of pectic methyl esterase enzyme, the pectin gets largely converted to pectic acid which is water-insoluble. Due to this reason both immature and over-ripe fruits are not suitable for making jelly and only ripe fruits are used.

References

This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (November 2020) (Learn how and when to remove this message)
  • G. O. Aspinall and A. Cañas-Rodriguez (1958). "810. Sisal pectic acid". Journal of the Chemical Society: 4020–4027. doi:10.1039/JR9580004020.
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