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Western blotting results of detecting MMp-9 knock down level. PC: MMP-9 positive control; NC1: negative control group; NC2: negative control group with effective interference vector for mouse GAPDH; 1#: Treated with 1# RNAi vector; 2#: Treated with 2# RNAi vector; 3#: Treated with 3# RNAi vector. 2# RNAi vector has a significant knock down effect on MMP-9.
