Supplementary Figure 1: Potential artifacts during the preparation of mapping samples for Illumina high-throughput sequencing.
From: Using TRIP for genome-wide position effect analysis in cultured cells

During iPCR-based mapping, intermolecular ligations between a barcoded fragment and an unrelated fragment of DNA or between two barcoded fragments can lead to the production of fragments with non-existing combinations of barcode and the genomic DNA.