1. A yellow heterocyclic compound that is the core structure of flavins, including riboflavin (vitamin B2) and flavin adenine dinucleotide (FAD); used in biochemistry and enzyme research.
Usage: technical; chemistry; biochemistry

Examples

• Isoalloxazine is the fundamental chromophoric unit found in all flavin coenzymes.
• The yellow color of riboflavin comes from its isoalloxazine ring system.
• Researchers studied how isoalloxazine derivatives function as electron carriers in metabolic pathways.
• FAD contains an isoalloxazine moiety linked to adenosine nucleotide.
• The isoalloxazine structure enables flavins to participate in redox reactions within cells.