diff --git a/README.rst b/README.rst
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--- a/README.rst
+++ b/README.rst
@@ -60,6 +60,7 @@ Biology
 * MIT Cancer Genomics Data: http://www.broadinstitute.org/cgi-bin/cancer/datasets.cgi
 * NIH Microarray data: ftp://ftp.ncbi.nih.gov/pub/geo/DATA/supplementary/series/GSE6532/
 * Protein structure: http://www.infobiotic.net/PSPbenchmarks/
+* Protein Data Bank: http://pdb.org/
 * Public Gene Data: http://www.pubgene.org/
 * Stanford Microarray Data: http://smd.stanford.edu/
 * UniGene: http://www.ncbi.nlm.nih.gov/unigene