tokens: Unusual two-domain arginine kinases ( AKs ) arose independently at least two times during molecular evolution of phosphagen kinases : AKs from the primitive sea anemone Anthopleurura japonicus and from the clam Pseudocardium sachalinensis .
folded_tokens: unusual two-domain arginine kinase ( ak ) arise independently at least two time during molecular evolution of phosphagen kinase : ak from the primitive sea anemone anthopleurura japonicus and from the clam pseudocardium sachalinensis .