Generating molecular replacement models

[Rick Faber]

We're looking for a quick way to make molecular replacement models. 
The ideal program would use a file containing sequence of the 
unknown structure to pare down a coordinate file of a known
structure  (assuming the sequences are already aligned).  

Ideally the resulting output file would contain only atoms common to both
structures.  

ie

sequence of	sequence of 
unknown 	known               search
structure       structure           model
--------        ---------           _______
Phe		Tyr         --->    phe
Ser             Thr         --->    ser
Gly 		*           --->    gly


Cheers,
Rick