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Cell-selective labeling of sialoglycans by CD22-targeting liposomes. hCD22_CHO and WT CHO cells were treated with BPCNeuAc-LP-9AzSia (A), POBNeuAc-LP-9AzSia (B), LP-9AzSia (C), and 9AzSia (D) at varied concentrations for 24 h. The cells were then reacted with DBCO-biotin, stained with streptavidin-AF647, and analyzed by flow cytometry. MFI, mean fluorescence intensity. a. u., arbitrary unit. Error bars represent ± SD.
