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SDS/PAGE of proteins from E. coli cells expressing one reading frame of microgenes polymers. (A) α-Helix microgene. (B) β-Strand microgene. Molecular markers were run in lane M, and their sizes are shown on the left in kilodaltons. Visible bands that are expected to be products are indicated by green dots. Some of them (clones 3 and 8 from A and 4, 5, and 8 from B) were confirmed to be products of microgene by purifying them using oligo histidine–tag (data not shown).
