RCK

RCK is an acronym that can refer to different concepts across disciplines. Because it is a short initialism, its specific meaning depends on the context in which it appears.

In biochemistry and physiology, RCK stands for Regulator of Conductance of K+, a family of regulatory domains found in some potassium channels. These RCK domains—often designated RCK1 and RCK2—form a cytoplasmic regulatory region that binds ligands such as calcium and magnesium to modulate channel opening. They are found in both prokaryotic and eukaryotic channels and play a key role in linking intracellular signals to potassium conductance.

In other domains, RCK is used as an acronym for various organizations, projects, or technical terms. Because there is no single standard expansion, the exact meaning should be inferred from the surrounding text. When encountering RCK, it is advisable to look for defining clauses, the field of study, or a glossary to determine which expansion is intended.