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(A) WLBs of various amounts of rhCTGF (0–500 pmol) and 3 pmol of IGFBP-3E. coli with 125I-IGFs after denaturing nonreducing SDS/PAGE. (B) WLBs of various amounts of rhCTGF, IGFBP-7 (100 and 300 pmol), and 3 pmol of IGFBP-3E. coli with 125I-IGFs after nondenaturing PAGE.