. Author manuscript; available in PMC: 2009 Sep 1.

Published in final edited form as: J Comput Chem. 2008 Sep;29(12):1970–1981. doi: 10.1002/jcc.20953

Table IV.

Excess number of ions (Na⁺ or/and Mg²⁺) next to tRNA in the nonlinear PB model according to di erent criteria for the maximum concentration (Eqs. 9 and 10). a is ionic radius, α is a parameter which scales the cuto c_max (Eq. 8). n1 and n2 as in Table III.

	a_Na [Å]	a_Mg [Å]	$Δ \overset{‒}{n} = 0$	Δn^α=1	Δn^α=2	Δn^α=3	Δn^α=4

n1	1.0	-	0	0.1	0	0	0
	2.4	-	0	4.6	2.0	1.1	0.7
	3.8	-	4.7	12.9	8.2	6.0	4.6

n2	3.8	-	0	0	0	0	0
	-	3.5	0	4.3	2.6	1.9	1.4
	3.5	3.5	0	6.0	4.2	2.4	1.8