CapH transcriptional repressor, illustration
Illustration of the C-terminal domain of the transcriptional repressor CapH from the bacterium Escherichia coli. This protein helps to regulate the CBASS (Cyclic oligonucleotide based anti-phage signalling system) immune system that protects the bacterium against infection by bacteriophages (viruses that infect bacteria). CapH represses CBASS until a bacteriophage infection is detected., by FRANCISCO J. ENGUITA/SCIENCE PHOTO LIBRARY
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