Tags: Protein.
Plastocyanin/azurin family of copper-binding proteins (or blue (type 1) copper domain) is a family of small proteins that bind a single copper atom and that are characterised by an intense electronic absorption band near 600 nm (see copper proteins). The most well-known members of this class of proteins are the plant chloroplastic plastocyanins which exchange electrons with cytochrome c6 and the distantly related bacterial azurins which exchange electrons with cytochrome c551.
