TY  - RPRT
TI  - Structure and function of bacterial sigma factors.
AU  - J D Helmann
AU  - M J Chamberlin
PY  - 1988
DO  - 10.1146/annurev.bi.57.070188.004203
UR  - https://pubmed.ncbi.nlm.nih.gov/3052291/
ID  - 3052291
ER  -