A blind spot in lncRNA discovery.

Reading RNA turnover alongside abundance reveals a small, fast-decaying subpopulation of lncRNAs that may contain regulators, which is missed by steady-state RNA sequencing.

• Why it matters: Understanding the full scope of lncRNA function is limited by current methods that only measure abundance, potentially overlooking critical regulatory RNAs with rapid decay. This gap hampers the identification of functional lncRNAs involved in gene regulation.
• What they did: The authors propose analyzing RNA turnover in addition to abundance, using a method that captures both parameters to detect the elusive, fast-decaying lncRNA subpopulation, and to test whether the tail is enriched for regulatory elements.
• The result: This approach could enable the discovery of regulatory lncRNAs hidden by decay dynamics, improving the understanding of lncRNA functions and the regulatory landscape within cells.