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Tube I: PC-3+7F5@Au/Fe3O4 cell sample, tube II: PC-3+ IgG@Au/Fe3O4 sample; tube III: SMMC-7721+7F5@Au/Fe3O4 sample; Tube IV: SMMC-7721+ IgG@Au/Fe3O4 sample. Quantitative T2w SNR measurements (B) for the cell sample vials depicted in (A).
