6UU0

E. coli sigma-S transcription initiation complex with a 3-nt RNA and a mismatching GTP ("Fresh" crystal soaked with GTP for 1 hour)

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.