Glossary Term
Unique Molecular Identifier
PCR TermsEN
Definition
Short random nucleotide sequences that are ligated to each primer molecule during amplification of a nucleotide sample during library preparation to act as a unique tag. Their use helps to identify PCR duplicates in sequencing data.
Extended Notes
Source: National Cancer Institute, NCI Thesaurus 26.09d, C201932. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-20. No individual clinical interpretation or human reviewer is asserted.
Also Known As
Random BarcodeUMIUnique Molecular Identifier