To better understand the circadian clock in modern-day cyanobacteria, a research team has studied ancient timekeeping systems. They examined the oscillation of the clock proteins KaiA, KaiB, and KaiC (Kai-proteins) in modern cyanobacteria, comparing it to the function of ancestral Kai proteins.
The body defends itself against pathogens by depriving them of vital iron. However, this strategy doesn't always succeed against Salmonella. Researchers have discovered that these bacteria specifically target iron-rich regions within immune cells to replicate. Their findings on how pathogens evade the immune defense are important for fighting infections.