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QRT-PCR results for β-tubulin III after 7 days of growth in alginate hydrogels having different values of the elastic modulus. The data reported represent the ratio of the expression of β-tubulin III and 18S ribosomal RNA normalized relative to the ratio in cells cultured in highest modulus hydrogel (1-100). Error bars represent the standard deviation; *p<0.0005, **p<0.05 compared with highest modulus hydrogel (1-100) based on Student's t-test.
