5'-phosphoribosyl-5-aminoimidazole (AIR) + CO2 <=> 5'-phosphoribosyl-5-aminoimidazole-4-carboxylate (CAIR) (Gallus gallus)
5'-phosphoribosyl-5-aminoimidazole (air) + co2 <=> 5'-phosphoribosyl-5-aminoimidazole-4-carboxylate (cair) (gallus gallus)