A protein signal patch contains information to send a given protein to the indicated location in the cell. It is made up of amino acid residues that are distant to one another in the primary sequence, but come close to each other in the tertiary structure of the folded protein (see red patch in the diagram). Signal patches, unlike some signal sequences, are not cleaved from the mature protein after sorting.
A protein signal patch contains information for directing a specific protein to its designated location within a cell. This patch is composed of amino acids that are far apart in the primary sequence but come together in the folded protein's tertiary structure (see red patch in the diagram). Unlike some signal sequences, this patch remains attached to the mature protein after sorting.