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Western blotting results for four bacterial strains. GD1a ganglioside was detected with the anti-GD1a ganglioside antibody. Strain B4 showed two relatively clear bands at around 20 and 33 kDa and was considered as GD1a-positive. Strains H5 and D5, on the other hand, were not used in the subsequent experiments, as only smeared bands were observed.
