pectic acid

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Related to Polygalacturonic acid: pectic acid

pectic acid

[′pek·tik ′as·əd]
(biochemistry)
A complex acid, partially demethylated, obtained from the pectin of fruits.
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This change is attributed to the negative charges present in the xylem cell walls that interact with cations such as Ca2+, K+, Na+ and Mg2+ because of the dissociation of polygalacturonic acids that form COO- groups.
They gave their nanomagnets a "sugar coating" of polygalacturonic acid, Scarberry says, and then linked tiny proteinlike structures to the coating.
Extracted from the cell walls of higher plants, particularly citrus rinds, Pectin is a linear chain of polygalacturonic acid with varying degrees of methyl esterification, resulting in high- or low-methoxy pectin.
Polygalacturonic acid (for MP5 media) was added as a substrate to determine the polygalacturonase (PG) activity, and mineral medium plus pectin was added as a substrate (for MP7 media) to determine the pectin lyase activity (HANCKIN; LACY, 1984).
Recent researches show that polygalacturonic acid found in pectin has the most influence on decreasing plasma sugar and cholesterol.