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Electron microscopy of IF assembled from wild-type and/or mutant K5/K14 chains. These and all data are summarized in Table 3. (a) Wild type; (b) K5 1A Glu22Ala and K14 wild type; (c) K5 1B Glu84Ala and K14 wild type; (d) K5 wild type and K14 2B Glu76Ala; (e) K5 2B Glu106Asp and K14 wild type; (f) K5 2B Glu106Asp and K14 2B Glu106Asp; (g) K5 2B Glu106Ala and K14 wild type; (h) K5 2B Arg111Asp and K14 wild type. Bar, 200 nm.
