The Protein database is the most fundamental U.S. National Center for Biotechnology Information (NCBI) resource for proteins. It contains text records for individual protein sequences derived from a variety of sources, including GenBank, the NCBI Reference Sequence (RefSeq) project and several external databases including UniProtKB/SWISS-Prot and the Protein Data Bank (PDB). It is important to understand that the sequences contained in almost all Protein records (with the exception of PDB) are conceptual translations of an RNA coding sequence, meaning that no one determined the protein sequence experimentally, but rather inferred the sequence from the corresponding RNA. Protein records are available in several formats (including FASTA and XML) and are linked to many other NCBI resources, allowing users to find relevant data such as literature, DNA/RNA sequences, genes, biological pathways and expression and variation data.
Data Observation Network for Earth (DataONE) provides a single search tool of Earth-related datasets that are stored in a variety of data archives. This webpage explains how to use the search tool (called ONEMercury).
A comprehensive source of information about global change data from throughout the world. Data sets include coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere, and human dimensions of global change.