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. 2017 Oct 20;7:13682. doi: 10.1038/s41598-017-10946-2

Figure 6.

Figure 6

Flow cytometry analysis of PD-L1 expression in whole blood spiked with MDA-MB-231. High PD-L1 expressing cell line MDA-MB-231 was serially diluted in 2mL of whole blood and treated with RKC-10-Cy5 peptide and anti-cytokeratin. Counts of cells as low as 15 cells were seen using RKC-10-Cy5 peptide, and confirmed using the cytokeratin stain.