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Figure 1.

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The cloning and expression of α9- and β4-tubulin. (a) The expression of α9- and β4-tubulin in E. coli BL21 (DE3). M: standard protein molecular weight marker, lane 1: negative control without induction, lane 2: induced control, lane 3: the supernatant after sonication, lane 4: the pellet after sonication, and lane 5: purified recombinant tubulin. (b) Western blot analysis. M: standard protein molecular weight marker, lane 1: α-tubulin, lane 2: β-tubulin.