Figure 2. DNA library preparation using a transposase-based method (Nextera) developed by Illumina.
The transpososome complex comprises an engineered transposase pre-loaded with two double-stranded sequencing adapters. The transpososome simultaneously fragments the DNA and inserts the adapters. The full Illumina adapter sequences are completed during subsequent PCR cycling, after which the library is ready for quantitation and loading onto the flow cell.