the interaction of the cationic carbocyanine dye stains-all ( 1-ethyl-2- [ 3- ( 1-ethyl-naphthol [ 1,2-d ] thiazolin-2-ylidene ) -2- methylpropenyl ] naphthol [ 1,2-d ] thiazolium bromide ) with the eye lens proteins crystallins has been studied . alpha- and gamma-crystallins do not bind the dye , while beta- and delta-crystallins do , consistent with the fact that the latter two proteins bind the calcium ion . beta-crystallin resembles parvalbumin in that it induces only the j-band of the bound dye . delta-crystallin , on the other hand , induces only the gamma-band .
C0017030
gamma-crystallins
C0010422
crystallin