UniProt Release 2021_04

The UniProt consortium European Bioinformatics Institute (EBI), SIB Swiss 
Institute of Bioinformatics and Protein Information Resource (PIR), 
is pleased to announce UniProt Knowledgebase (UniProtKB) Release 
2021_04 (29-Sep-2021). UniProt (Universal Protein Resource) is a 
comprehensive catalog of information on proteins.

UniProtKB Release 2021_04 consists of 225,578,953 entries (UniProtKB/Swiss-Prot: 
565,928 entries and UniProtKB/TrEMBL: 225,013,025 entries)
UniRef100 Release 2021_04 consists of 280,483,851 entries
UniRef90 Release 2021_04 consists of 138,515,945 entries
UniRef50 Release 2021_04 consists of 49,874,565 entries
UniParc Release 2021_04 consists of 457,933,249 entries
UniProt databases can be accessed from the web at http://www.uniprot.org and 
downloaded from http://www.uniprot.org/downloads. Detailed release 
statistics for TrEMBL and Swiss-Prot sections of the UniProt Knowledgebase 
can be viewed at http://www.ebi.ac.uk/uniprot/TrEMBLstats/ and 
http://web.expasy.org/docs/relnotes/relstat.html respectively.