the chromophoric divalent metal ion chelators 4- ( 2-pyridylazo ) resorcinol ( par ) and 2,2',2 '' '' -terpyridine ( terpy ) are used as kinetic and spectroscopic probes to investigate in solution the scn- -induced conformational transformations of the insulin , proinsulin , and miniproinsulin hexamers ( miniproinsulin is a proinsulin analogue wherein the c-chain is replaced by a dipeptide cross-link between gly-a1 and ala-b30 ) .
C0021641
insuli
C0033362
proinsuli