Figure 1:
Growth of the UniProt and the PDB databases. This figure shows the number of accessions (on a logarithmic scale) throughout the past decade. In 2011, the UniProt had 161× as many protein sequences as the number of PDB entries. This ratio grew by an order of magnitude and was 1,132 to 1 in 2021, showing that the gap between known protein sequences and their structures keeps increasing.