The adapter is an important part of the library. Dynegene has its own patented U-adapter, which can effectively improve the conversion rate of the library and maintain the complexity of the library to the greatest extent possible. The adapter can be paired with the original "2 & 4" bp unique molecular identifier (UMI) to effectively reduce false positives when detecting low frequency mutations. Y-adapters are divided into truncated adapters and full-length adapters. The full-length Y-adapter is easy to operate and compatible with PCR-free library preparation. The truncated Y-adapter has better ligation efficiency and can obtain higher library yield with the same number of PCR cycles. At the same time, Dynegene also provides options such as adapters for MGI and Ion Torrent platforms.