Term Name:	CAAX_box
Synonyms:	CAAX box
Definition:	A C-terminus protein motif (CAAX) serving as a post-translational prenylation site modified by the attachment of either a farnesyl or a geranyl-geranyl group to a cysteine residue. Farnesyltransferase recognizes CaaX boxes where X = M, S, Q, A, or C, whereas Geranylgeranyltransferase I recognizes CaaX boxes with X = L or E.
Ontology:	Sequence Ontology [SO:0002230]