1 Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA.
2 Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA. Electronic address: bfree@illinois.edu.
In this issue of Molecular Cell, Cugusi et al. (2022) discover that inhibition of U1 telescripting is a novel mechanism that promotes a switch between gene programs in response to heat stress.