Table 1. Depth of protein VI tryptophan residue penetration into lipid bilayers.

The distance of W37, W41 and W59 from the center of the lipid bilayer (Zcf) were calculated by distance dependent quenching of tryptophan fluorescence. The Zcf values were calculated for each tryptophan residue as described in the methods section using Parallax and Distribution analyses.

	Zcf (Ǻ)
	Parallax	DA
W37	9.6 ±0.2	9.7 ±0.2
W41	10.6 ±0.3	10.6 ±0.3
W59	10.3 ±0.5	10.5 ±0.7