Table 2.

Parameters obtained for experiments at different [Mg²⁺]

[Mg2+] (mM)	P (nm)	log k0 (1/s)	(kBT)	g2 (kcal/mol)
0.00	1.27±0.03	12.40±0.40	55.58	0.000±0.005
0.01	1.50±0.15	12.05±0.30	55.50	−0.007±0.005
0.10	1.25±0.10	11.45±0.30	55.55	−0.005±0.005
0.50	0.90±0.15	11.50±0.30	57.06	0.0393±0.005
1.00	0.80±0.10	11.40±0.50	58.63	0.0858±0.005
4.00	0.75±0.10	11.15±0.50	62.60	0.2033±0.005
10.0	0.75±0.10	10.40±0.50	64.77	0.2678±0.005

Persistence length for ssRNA P, log k₀, theoretical predictions for the free energies of formation based on the TBI model, , and sequence-independent correction g₂([Mg²⁺]) for the RNA hairpin at different magnesium concentrations. A fixed concentration of 50 mM [Mon⁺] was used in all ionic conditions.