Table 4.

Influence of non-zero asymmetry parameters upon indole ring orientations and principal order parameters for tryptophans in gA channels^a.

Trp	Δρ1	Δρ2	ΔSzz
9	−0.5°	+5.0°	+0.06
11	+1.0°	+7.5°	+0.06
13	−1.5°	+8.5°	+0.05
15	−1.0°	+5.0°	+0.05

^aThe changes were determined by comparing the values of ρ₁, ρ₂ and S_zz in Table 3, obtained using the calculated values of η (Table 1; above), with those previously obtained assuming η = zero (Table 4 of ref #¹). The main insights from the nonzero η values are that the rings are somewhat more tilted in ρ₂ than would otherwise be determined, and the rings exhibit even less 'wobble' motion with respect to the bilayer normal (higher S_zz) than would be deduced if η were zero.