The menu PORNO holds the real fancy graphics stuff and some options that
were requested by users. The menus PORNO and GRAEXT are somewhat
similar, so options expected here but not found could very well
be found in the GRAEXT menuu. In the PORNO menu you will
find an interface to the RIBBONS program by Carson and Bugg. Also the
Chebyshev polynomial ribbons and arrows module written by David
Thomas is accessible from this menu.
The RIBBONS program is interfaced to WHAT IF. That means that the PORNO
menu creates the files needed to run the RIBBONS program,
The command RIBBON allows you to use the RIBBONS program to draw a ribbon
plus CPK models of side chains. You will repeatedly be prompted for a range
of residues through which to draw a ribbon, and for a range of which the
side chains will be represented as CPK models. If you answer both questions
with 0 (zero) WHAT IF will cause RIBBONS to start. See your RIBBON writeup
about how to operate the RIBBON program.
The command RIBCPK function similar to RIBBON (see above). The difference is
that RIBBON draws CPK's of only side chain atoms, whereas RIBCPK uses the
whole residues for CPK representation.
The command HBOFIL will cause WHAT IF to prompt you for two ranges.
The hydrogen bonds between these two ranges will be calculated and a RIBBONS
cylinder file will be created that can manually be added to the RIBBONS file
with cylinder file names.
The command CARROW will cause WHAT IF to prompt you for a residue range. This
range will be displayed by cones that run from alpha carbon to alpha carbon
with their wide end N-terminal, and their pointed end C-terminal. The terminal
residues of of molecules are not always displayed.
The command CARROW will cause WHAT IF to prompt you for a residue range. This
range will be labeled with crosses at their alpha carbon positions.
This coomand spline does the same as the command SPLINE in the GRAFIC menu.
(See the GRAFIC menu).
Calling PLUTON a small molecule plotting program is really an insult to it,
because PLUTON is a very fancy program that can do very many thing,
but I expect that most WHAT IF users will not do much more than this with it.
You need to get the PLUTON program from T Spek (see the chapter on licenses).
WHAT IF, as usual with other people's programs, only provides an interface.
The command APLVIE will take the present graphical view matrix and apply it
to the soup. Be aware that after this option old MOL-items no longer correspond
with the soup, and thus are no longer pickable. This option is useful as
preparation for complicated RIBBON pictures in which you want to make
manual modifications.