Registered File Types

File types that have been registered in Chimera can be opened from:

the system command line upon startup; the format can be specified by a suffix that is part of the filename or by prefix:filename, where prefix is not part of the filename (the default is Python)
the command line within Chimera (using the command open); the format can be specified as described above, except the default is PDB
Open/Save Dialogs

If an extension-specific type of file is opened, the associated extension will be executed or started (if it has not been started already).

Registered File Types
format	prefix	suffix	contents	associated extension (if any)
Aligned FASTA	afasta:	.afasta .fasta .fa	sequence alignment	Multalign Viewer
Aligned NBRF/PIR	pir:	.pir	sequence alignment	Multalign Viewer
Chimera markers	markers:	.cmm	markers placed in 3D	Volume Path Tracer
Clustal ALN	aln:	.aln .clustal .clustalw .clustalx	sequence alignment	Multalign Viewer
DelPhi or GRASP	delphi:	.phi	computed electrostatic potential (see also DelPhiViewer)	Volume Viewer
DSN6	dsn6:	.omap	crystallography density map used by O	Volume Viewer
Gaussian formatted checkpoint	fchk: gaussian:	.fchk	molecular structures
GCG MSF	msf:	.msf	sequence alignment	Multalign Viewer
GCG RSF	rsf:	.rsf	sequence alignment	Multalign Viewer
Mol2	mol2:	.mol2	molecular structures
MPOSE	mpose:	.mpose	molecular structures	MPOSE
MRC	mrc:	.mrc	electron microscope density map	Volume Viewer
NetCDF	netcdf:	.nc	generic portable array format	Volume Viewer
PDB	pdb:	.pdb .ent	molecular structures
Priism	priism:	.xyzw	3D light and electron microscope data	Volume Viewer
Python	python: py: chimera:	.py .pyc .pyo .pyw	code
VRML	vrml:	.vrml .wrl	graphical objects
XPLOR	xplor:	.map	unformatted ASCII density map	Volume Viewer