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Figure 6


Fig. 6. Protein abundance assessments in embryonic chicken cardiomyocytes grown on soft or hard matrices. (A) SDS-PAGE separation and densitometry analyses of lysates from 7-day embryonic chicken cardiomyocytes grown on 1 kPa or 34 kPa grown for 24 hours and then lysed, denatured and labeled by mBBr. (B) Mass spectrometry analyses of tryptic peptides or immunoblot results from the indicated gel bands (a-c). These bands were chosen as candidate cytoskeletal proteins using differential labeling in in-situ Cys-shotgun experiments (Table 1). The numbers of unique peptides are indicated from two different experiments. Immunoblotting for sarcomeric myosin and vimentin also indicated no significant differences in abundance.





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