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Supplemental Figure 3 Purified Collagens A) B) Purified Collagen1 (μg) 0.12 0.25 0.5 1 2.5 5 10 20 Purified Col1 Purified Col3 Col1 Purified Collagen3 (μg) Col1 0.12 0.25 0.5 1 2.5 5 10 20 Col3 Col3 Col1 Col3 Arbitrary Units μg protein Cellular extracts C) Sample 1 Sample 2 μg protein 1 2.5 5 10 20 30 1 2.5 5 10 20 30 Col1 Col3 Actin