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. 2010 Apr 28;10:35. doi: 10.1186/1472-6750-10-35

Figure 1.

Figure 1

Cytokeratin 20 RT-PCR amplification products after immunomagnetic enrichment with both Ep-CAM antibodies from blood samples of two CRC patients. W, water negative control; Pos positive control (HT29 cells); Neg, negative control (blood of healthy person); L, ladder (molecular weight marker). Lanes A1-A2, patient ID 22 and Lanes B1-2, patient ID 23. A2 and B2 show CK20 products after CTC enrichment with KS1/4 beads whereas BerEP4 beads failed to detect CTC in the same patients (A1 and B1).