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Competition between PCPE and non-enhancing constructs. Samples were analyzed by SDS-PAGE on 8% acrylamide gels stained with Coomassie Blue under non-reducing conditions. The molar ratio mini-procollagen III/PCPE/construct was 1/0.75/5. MiniIII, mini-procollagen III; CPIII, C-propeptide III; and N-ter, N-terminal cleavage product.
