Tags: Protein.
The potassium crystallographically-sited activation channel (KcsA) is a prokaryotic potassium ion channel from the soil bacteria Streptomyces lividans activated by changes in pH. Roderick MacKinnon and his colleagues were the first to crystallize a KcsA potassium channel.KcsA has become the most extensively studied potassium channel and is widely used as the template in potassium channel research.