Anthrax protective antigen molecule
Contributor:Science Photo Library / Alamy Stock Photo
File size:50 MB (1.5 MB Compressed download)
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Dimensions:4827 x 3620 px | 40.9 x 30.6 cm | 16.1 x 12.1 inches | 300dpi
Photographer:LAGUNA DESIGN/SCIENCE PHOTO LIBRARY
Anthrax protective antigen molecule. Computer model showing the structure of a molecule of protective antigen (PA) produced by anthrax (Bacillus anthracis) bacteria. Anthrax employs a suite of three proteins, collectively termed anthrax toxin, that attack target organisms. Protective antigen is the first of these and works by providing a ready-made pore in its victim's cell membrane, through which the other two proteins, oedema factor and lethal factor (not shown), can be delivered into the cell's interior.