1	function signal = eq_binding(Et, Lt, Kd, signal)
2	%simulate equilibrium binding E + L <=> EL
3	%<gfitModelDescription version=“100”>
4	%variable	type	minVal
5	% Et	free	0
6	% Lt	independent	0
7	% Kd	para	0
8	% signal	dependent	()
9	%
10	%variable	size	plotVs
11	% Et	Lt	()
12	% signal	Lt	Lt
13	%</gfitModelDescription>
14	EL = (Kd + Et + Lt - sqrt((Kd + Et + Lt). ˆ2 - 4 * Et.* Lt))/2;
15	signal = EL;