The equine arteritis virus leader transcription-regulating sequence hairpin (LTH) is as RNA element that is thought to be a key structural element in discontinuous subgenomic RNA synthesis and is critical for leader transcription-regulating sequences (TRS) function.
In the context of equine arteritis virus, the LTH RNA element is a critical component that facilitates the production of subgenomic RNA and ensures the correct regulation of gene expression through leader transcription-regulating sequences.