TABLE 1.

Summary of simulations carried out in this study

Name	Length (ns)	Counterions	Nucleotides	Water molecules
Kt-38	43	21 Na+	22	4413
Kt-42	37	36 Na+	38	11458
Kt-58	33	27 Na+	28	4687
Kt-U4	74	15 Na+	17	3738

Basepairing of the simulated K-turns is shown in Fig. 1.