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Loss of heterozygosity (LOH) at 17p13 in colorectal cancer. N: Normal DNA; T: Tumor DNA. (A) LOH at p53. Genomic DNA was digested with ScaI. LOH was detected in Sample 2. (B) LOH at YNZ22. Genomic DNA was digested with MspI. LOH was detected in Samples 2 and 4.
