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Electron microscopy images of pili on L. rhamnosus GG. EM was performed on samples from the CHCC stock and the seven freeze-dried industrial production batches (FD1 to FD7) of L. rhamnosus GG labeled with polyclonal anti-SpaA rabbit antibodies and protein A-gold particles to visualize pili. For the control, L. rhamnosus GG from the CHCC stock without polyclonal anti-SpaA rabbit antibodies was used.
