Azat Badretdinov, 12/4/97:

CHANGES:
  12/17/97: now CHARMM format is used
            NOTE! For PDB entries missing atoms were calculated based on 
	    the "ideal" values for their internal geometry. Example: LYS:169 in 1ak2.crd
Only X-ray structures with resolution better than 2A were considered,

They had to correspond to protein chains from single-chain PDB entries (therefore 
we do not report their chain ID's) with all heavy atoms refined (there are several 
examples of structures reported as solved at the resolution better than 2.0A, but 
only for their Ca atoms).

They had to have less than 50% sequence homology to any other protein chain from 
the set of protein chains.

The number of heteroatoms (of non-amino acid nature) allowed in the structure was 
limited to maxhet = 20.

There are 89 models for 42 targets.

Naming conventions:

targets/pdb1yyy.ent                 - PDB targets
targets/1yyy.crd                    - ... in CHARMM format
<other directories>/1xxxX-1yyy.pdb  - corresponding models based on chain X of template 1xxx 
<other directories>/1xxxX-1yyy.crd  - ... in CHARMM format
<x-yA>                              - directory, containing models which CA RMS between model 
                                      and target is between x and y Ansgtrem

All models were calculated by MODELLER4.