Proseq

ENZYME is a repository of information relative to the nomenclature of enzymes.And it describes each type of characterized enzyme for which an EC (Enzyme Commission) number has been provided

InterPro provides functional analysis of proteins by classifying them into families and predicting domains and important sites.

The Kabat database includes nucleotide sequences, sequences of T cell receptors for antigens (TCR), major histocompatibility complex (MHC) class I and II molecules, and other proteins of immunological interest.

Protein Information Resource, part of UniProt.

The Universal Protein Resource (UniProt) provides the scientific community with a single, centralized, authoritative resource for protein sequences and functional information.