RuvC uses dynamic probing of the Holliday junction to achieve sequence specificity and efficient resolution.

Holliday junctions (HJs) are four-way DNA structures that occur in DNA repair by homologous recombination. Specialized nucleases, termed resolvases, remove (i.e.

Annexins - calcium- and membrane-binding proteins in the plant kingdom: potential role in nodulation and mycorrhization in Medicago truncatula.

Annexins belong to a family of multi-functional membrane- and Ca(2+)-binding proteins. The characteristic feature of these proteins is that they can bind membrane phospholipids in a reversible, Ca(2+)-dependent manner. While animal annexins have been known for a long time and are fairly well characterized, their plant counterparts were discovered only in 1989, in tomato, and have not been thoroughly studied yet.

[Participation of annexin At1 in plant response to abiotic stress].

Annexins are calcium-dependent phospholipid-binding proteins existing both in animal and plant cells. Mammalian and especially human annexins were examined for many years, and their functions in these organisms are already well known, but it is not the case for plant annexins. On the basis of existing literature and experimental evidence, it can be proposed that plant annexins may have a role in stress response.