Annual Scientific Report 2015

In 2015 our core data resources continued their steady growth. The cost of generating data continued to fall,
which has a dramatic impact on EMBL-EBI databases as it enables researchers to generate more data. EMBL-EBI
continues to develop and implement innovative data-storage methods.
• Nucleotide sequence data: 4.52 Petabytes stored (compare to 3.06 petabytes in 2014). A Petabyte is 1 x 10 15 bytes;
• Genomes, all species and strains: 30 674 (compare to 20 343 in 2014);
• Gene expression assays: 1.90 million (compare to 1.62 million in 2014);
• Protein sequences: 55.3 million (compare to 89.1 million in 2014). The large reduction is due to removal of millions of identical
sequences from closely related organisms to reduce response times for user queries;
• Macromolecular structures: 114 691 (compare to 105 444 in 2014);
• Protein families, motifs and domains—entries in InterPro: 28 678 (compare to 27 002 in 2014).
2015 EMBL-EBI Annual Scientific Report 51