Riboflavin kinase catalyzes the phosphorylation of riboflavin to create flavin mononucleotide(FMN). The B vitamins riboflavin, thiamin, niacin, and pyridoxine dissolve into cooking water at differing rates. It has higher levels of protein, thiamine, riboflavin, phosphorus, calcium, and iron than wheat flour. In the 1930s, some flour began to be enriched with iron, niacin, thiamine and riboflavin. A palmitate, riboflavin (vitamin B2), and vitamin D3. Kittens also require riboflavin (vitamin B) for heart health, pantothenic acid (vitamin B), and folacin. They are a good source of iron, copper, riboflavin, niacin and contain dietary fiber. MAIT cells are activated by compounds derived from bacterial vitamin B2 (riboflavin) biosynthesis. The biochemical source is the vitamin riboflavin. There is also a variation by strain for requirements of riboflavin, pyridoxal and folic acid. Riboflavin is in the vitamin B group. Differential diagnosis include riboflavin deficiency and avian encephalomyelitis. Perilla leaves are also rich in vitamins A, C and riboflavin. As a supplement it is used to prevent and treat riboflavin deficiency and prevent migraines. Riboflavin deficiency in birds results in low egg hatch rates.