<p> The Ca2+-dependent, lipid-binding domain (CaLB) has been identified in a number of proteins, for example the amino-terminal, 138 amino acid C2 domain of cytosolic phospholipase A2 (cPLA2-C2) which mediates an initial step in the production of lipid mediators of inflammation: the Ca2+-dependent translocation of the enzyme to intracellular membranes with subsequent liberation of arachidonic acid. The domain is composed of eight antiparallel beta-strands with six interconnecting loops that fits the "type II" topology for C2 domains. The structure has been identified as a beta-sandwich in the "Greek key" motif [<cite idref="PUB00010646"/>].</p>