The evidence suggests that a novel secretion system, which is unlike type I–VI secretion systems, exports proteins across the highly impermeable cell walls of mycobacterium. In this Opinion, Wilbert Bitter and colleagues propose to call this system, in line with the accepted nomenclature, type VII secretion.
- Abdallah M. Abdallah
- Nicolaas C. Gey van Pittius
- Wilbert Bitter
