IUBMB Enzyme Nomenclature


Accepted name: chalcone isomerase

Reaction: A chalcone = a flavanone

See diagram for reaction in naringenin or liquiritigenin biosynthesis.

Other name(s): chalcone-flavanone isomerase; flavanone lyase (decyclizing)

Systematic name: flavanone lyase (ring-opening)

Links to other databases: BRENDA, EXPASY, GTD, KEGG, Metacyc, PDB, CAS registry number: 9073-57-8


1. Moustafa, E. and Wong, E. Purification and properties of chalcone-flavanone isomerase from soya bean seed. Phytochemistry 6 (1967) 625-632.

[EC created 1972]

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