The role of pseudogenization of T1R genes in evolution of feeding behaviour is also illustrated, by a recent finding that Tas1r1 is a pseudogene in the giant panda (Ailuropoda melanoleuca),[76,77] which deems its umami/amino acid taste receptor dimer T1R1+3 non-functional. Most species of the order Carnivora have an intact Tas1r1. The giant panda also belongs to the order Carnivora, but it eats almost exclusively bamboo, and estimated time of its dietary switch to bamboo coincides with time of its Tas1r1 pseudogenization.[76]
