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Six percent sodium dodecyl sulfate‐polyacrylamide gel electrophoresis of pepsin‐treated collagen secreted by fibroblasts (M) and retained in cell layer (CL) of a patient affected by vEDS (P) and an age‐matched control (C). In the first and in the third lanes a delay in the electrophoretic mobility of α1(III) chain is observed. Furthermore, a decreased amount of α1(III) chain can be detected
