riboflavine


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ri·bo·fla·vin

, riboflavine (rī'bō-flā'vin),
A heat-stable factor of the vitamin B complex with isoalloxazine nucleotides that are coenzymes of the flavodehydrogenases. The daily adult human requirement is 1.7 mg for adult men and 1.3 mg for adult women, with a higher daily requirement during pregnancy and lactation; dietary sources include green vegetables, liver, kidneys, wheat germ, milk, eggs, cheese, and fish.
Synonym(s): flavin (1) , flavine, lactoflavin (2) , vitamin B2 (1)

riboflavin, riboflavine

vitamin B2, a component of FAD and FMN, which are coenzymes or prosthetic groups for certain enzymes (flavoproteins) that catalyze many oxidation-reduction reactions. Called also vitamin G, lactoflavin.

riboflavin kinase
an enzyme (a phosphotransferase) that catalyzes the conversion of free riboflavin and ATP to flavin mononucleotide (FMN) and ADP. Called also flavokinase.
riboflavin nutritional deficiency
causes conjunctivitis with corneal vascularization, dermatitis, glossitis and muscular weakness. Occurs rarely in dogs, but not a natural deficiency in farm mammals. In birds it causes a fall in egg production, decreased hatchability, curled toe paralysis and poor growth.