Especially, the SNA signal did not localize on the b-tubulin + cells (ratio of MAA + /b-tubulin + cells, 0.0160.01, n = 237) (Fig. 2C ). Testing the SNA-I, which was provided by EY Laboratories, showed no difference to the result of SNA, evidenced by the undetectable binding by SNA-I on the ciliated cells (Fig. 2D ).