Category:FL

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FL: Flavonoid

Structural Characteristics

Flavonoid is a class of plant secondary metabolites that have two benzene rings (each called A-ring and B-ring) connected by a chain of three carbons (Figure 1).
Figure 1: The Backbone of Flavonoid Structure

The carbon chain, corresponding to the numbers 2,3,4 in Figure 1, is linked to a hydroxyl group in the A-ring to form the C-ring. The class of flavonoids are usually determined by the modification pattern of the C-ring (Table 1).

names structure class description
Aurones
and
Chalcones
100px FL1 The C-ring is absent (chalcones) or a 5-member ring (aurones).
Flavanone 100px FL2
Flavone 100px FL3
Dihydroflavonol 100px FL4 Because many flavonols (FL5) are hydroxylated at their position 3, they form a different category in our classification.
Flavonol 100px FL5
Flavan 100px FL6
Anthocyanin 100px FL7
Isoflavonoid 100px FLI
Neoflavonoid 70px FLN


Biosynthesis

Flavonoid is synthesized through the phenylpropanoid-acetate pathway in all higher plants. It is responsible for many biological activities including pigments, anti-oxidative or anti-allergic agents, and signaling elements in nodule formation. Some of them are quite familiar in our daily life.


Familiar examples. anthocyanin (blueberry), isoflavone (soybean), rutin (soba noodle), catechin (tea), flavan-diol (tea), naringeninchalcone (tomato), polyphenol (wine, cacao)

Subcategories

This category has the following 10 subcategories, out of 10 total.

F

  • FL1(4 C)
  • FL2(1 C)
  • FL3(1 C)
  • FL4(1 C)

F cont.

  • FL5(1 C)
  • FL6(4 C)
  • FL7(2 C)
  • FLI(10 C)

F cont.

  • FLN(6 C)
  • [×] FLT(empty)

Pages in category "FL"

The following 2 pages are in this category, out of 2 total.

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