This frees the mature protein from the ribosome, and results in the formation of a free carboxylate group at the end of the protein (this is called the carboxy-terminus, or C-terminus of the protein, ...This frees the mature protein from the ribosome, and results in the formation of a free carboxylate group at the end of the protein (this is called the carboxy-terminus, or C-terminus of the protein, while the other end – the ‘starting’ end – is called the N-terminus).
