The distribution of SAa2-6Gal on the CTE cells was determined by staining with SNA (Vector Laboratories). In contrast to the finding for MAA/MAL-I, abundant SNA signals were mainly restricted to the mucin + cells (ratio of SNA + /mucin + cells, 0.8560.09, n = 368) ( Fig. 2A) , indicating that the goblet cells expressed SAa2-6Gal terminal glycan. In addition, SNA lectin can also be detected in a one-third proportion of K14 + cells (ratio of SNA + /K14 + cells, 0.3660.09, n = 284) (Fig. 2B) .