HDAC inhibitor treatment significantly impacts SW13 cell lectin binding and sulfation status. Total protein was isolated from SW13 control cells and SW13 cells that had been treated with 1 nM FK228 for 24 h (n = 4 per group). a FK228 treated SW13 cells have significantly higher levels of GAG-chain sulfation compared to SW13 control cells. b Lysates were subjected to lectin microarray analysis. Histograms of the fluorescence intensities lectins which were differentially bound between SW13 control cells and FK228 treated cells are shown. Data are presented as means ± SEM. c Lectin blots were performed to confirm lectin array results of select lectins (ConA, LPA, GS-I, Lotus, AIA, MPA, and ECA) that were differentially bound. DBA and UAE-1 were stained as negative controls. *Denotes statistical difference compared to control SW13- cells, p < 0.05.