Nakayama, K. Furin: a mammalian subtilisin/Kex2p-like endoprotease involved in processing of a wide variety of precursor proteins. Biochem. J. 327, 625–635 (1997).

The intramolecular chaperone (IMC) of subtilisin was used to trap a partially folded, stable crosslinked intermediate conformer (CLIC) through a disulfide bond between mutated IMC and subtilisin.