VEN, VENN

NAME
VEN, VENN - draw Venn diagram.

SYNOPSIS
VEN
VEN OFF
VEN start_index end_index
VENN
VENN OFF
VENN start_index end_index

DESCRIPTION
Draw Venn diagram for the given protein sequence or sequence fragment. Venn diagram gives the quick statistical overview of the protein sequence: count of residues and residue types. It is primarily intended for students. Experts will not find this routine very interesting.



KEYWORDS AND PARAMETERS
The command VENN may be used alone, combined with the keyword OFF or with two residue serial indices. If used alone, the Venn diagram will be drawn for the entire sequence stored in the main sequence buffer. Two residue serial indices may be used to specify the residue range. The keyword OFF is used to return to the main drawing mode (structure drawing mode).

EXAMPLES
COMMAND DESCRIPTION
load 2por.pdb
seq from 1
ven 		Load the specified structure (porin),
copy the sequence from this structure
to the main sequence buffer and draw
Venn diagram.
ven 1-100 Prepare Venn diagram with counts, but
only for residues with serial numbers
from 1 to 100.
ven off Return to default drawing mode.
Instead using this command,
you can hit the ESCAPE key.

NOTES
(1) Instead using the command VENN OFF, the ESCAPE key may be pressed to return to the main drawing mode.

(2) Ven diagram is a term from the set theory, which is part of mathematics. Different sorts of Venn diagrams may be found in different branches of science.

(3) If used without any parameters, Venn diagram will be drawn for the entire sequence, including solvent molecules, which are typically included to PDB file after the protein structure. However, these residues will not be included into individual residue counts. If you want to exclude the solvent molecules from Venn diagram, check the serial index of the last protein residue. After that, use the range from residue 1 to this residue (use the actual residue number in the place of last_residue):

ven 1 last_residue

RELATED COMMANDS
SEQUENCE is used to copy, define or load the sequence.