Hexuronic acid is any
uronic acid
300px, The glucose.html" ;"title="Fischer projections of D-glucose">Fischer projections of D-glucose (left) and D-glucuronic acid (right). Glucose's terminal carbon's primary alcohol group has been oxidized to a carboxylic acid.
Uronic acids ...
derived from a
hexose
In chemistry, a hexose is a monosaccharide (simple sugar) with six carbon atoms. The chemical formula for all hexoses is , and their molecular weight is 180.156 g/mol.
Hexoses exist in two forms, open-chain or cyclic, that easily convert into ...
. These include
fructuronic acids,
galacturonic acid
-Galacturonic acid is a sugar acid, an oxidized form of -galactose. It is the main component of pectin, in which it exists as the polymer polygalacturonic acid. In its open form, it has an aldehyde group at C1 and a carboxylic acid group at ...
s,
glucuronic acid
Glucuronic acid (GCA, from ) is a uronic acid that was first isolated from urine (hence the name "uronic acid"). It is found in many natural gum, gums such as gum arabic ( 18%), xanthan, and kombucha tea and is important for the metabolism of ...
s,
guluronic acid
Guluronic acid is a uronic acid monosaccharide that may be derived from gulose. -Guluronic acid is a C-3 epimer of -galacturonic acid and a C-5 epimer of -mannuronic acid. Along with -mannuronic acid, -guluronic acid is a component of alginic aci ...
s,
iduronic acid
-Iduronic acid (IUPAC abbr.: IdoA) is the major uronic acid component of the glycosaminoglycans (GAGs) dermatan sulfate, and heparin. It is also present in heparan sulfate, although here in a minor amount relative to its carbon-5 epimer glucuronic ...
s,
mannuronic acid
Mannuronic acid is a uronic acid monosaccharide that can be derived from mannose. Along with -guluronic acid, -mannuronic acid is a component of alginic acid, a polysaccharide found predominantly in brown algae
Brown algae (: alga) are a lar ...
s, and
tagaturonic acids.
In the early 1900s,
ascorbic acid
Ascorbic acid is an organic compound with formula , originally called hexuronic acid. It is a white solid, but impure samples can appear yellowish. It dissolves freely in water to give mildly acidic solutions. It is a mild reducing agent.
Asco ...
(vitamin C) was also known as hexuronic acid. This is no longer the case.
References
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