Re: [PyMOL] PyMOL-users Digest, Vol 116, Issue 15

I am trying to show some cell surface receptors and to indicate their position relative to the membrane.

I thought to indicate the plane of the membrane by a flat disk, a ago cylinder.

x1,y1,z1 = 0, -1, 0 # start point
r1,g1,b1 = 1, 1, 0 # color (yellow)
x2,y2,z2 = 0, -2, 0 # end point
r2,g2,b2 = 1, 1, 0 # color (yellow)
radius = 100
cmd.load_cgo( [ 9.0, x1, y1, z1, x2, y2, z2, radius, r1, g1, b1, r2, g2, b2 ], "membrane" )

When I try to move this cylinder into the correct position with cmd.transform_selection,
using the transformation parameters extracted from get_view (reordering them as needed)
I get the error message "Selector-Error: Invalid selection name “membrane” “

The same transform command works fine if I apply it to a pseudo atom originally generated with coordinates 0,0,0.

Any suggestion how else I could indicate the membrane, or how I could place my ego object parallel 
to the screen yz plane? I have to be able to do this in a reproducible fashion, as I have to  do this
for a large number of constructs that bend my receptors relative to the membrane in various ways. 

Thanks for your help
		Annemarie
	
_______________________________

Dr. Annemarie Honegger PhD
Department 
of Biochemistry
Zürich University
Winterthurerstrasse 190
CH-8057 Zürich
Switzerland