. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "tbb4b_human"^^ . "Tubulin beta-2C chain"^^ . "Tubulin beta-2 chain"^^ . "TUBB2C"^^ . "TUBB4B"^^ . . "Tubulin beta-4B chain"^^ .