Use of this singular file should be acknowledged with the citation of its authors:

P. Evans, O.A. Bateman, C. Slingsby, B.A. Wallace 2007 Experimental Eye Research A reference dataset for circular dichroism spectroscopy tailored for the b-gamma-crystallin lens proteins 84 1001-1008

Use of any records obtained from the PCDDB should be acknowledged by citing the PCDDB :

Whitmore, L., Woollett, B., Miles, A.J., Klose, D.P. Janes, R.W. and Wallace, B.A.
PCDDB: the protein circular dichroism data bank, a repository for circular dichroism spectral and metadata.

Nucleic Acids Research (2011) 39 D480-D486

ZIP file (windows compatible)	PCDDB PCD file
TAR file (*nix compatible)	PCDDB Gen file

Notes about .pcd and .gen file formats.