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Bright-field images (A) and DAPI-stained nuclei (B) of CD133+ cells attached to Transwell membranes in the presence and absence of catalase (Cat). C: addition of catalase in the coculture reduced the numbers of CD133+ cells attaching to membrane under hypoxia. D: bright-field images and DAPI stained nuclei of CD133+ cells attached to Transwell membranes in the presence of H2O2. Peg, pegylated catalase.
