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. 2016 Jan 6;6:18905. doi: 10.1038/srep18905

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(A) Tissue uptake of HYNIC-lys(Cy5.5)-PEG₄-biotin. Yellow arrows mark tumors. (B,C) Local NIRF imaging of mouse intestines with colon tumors. Dashed arrows mark tumors. (D,E) Contrast between tumor uptakes of HYNIC-lys(Cy5.5)-PEG₄-biotin with and without pretargeted avidin. Solid line arrows mark the tumors. (F,G) HE staining of selected tumor section.