although principally cytoplasmic , delta-crystallin may associate with the cell membrane . delta-crystallin differs from other lens crystallins in its alpha-helical content , native and subunit molecular weights , antigenicity , low wavelength of maximum fluorescence emission ( 315 nm ) after excitation at 280 nm and amino acid composition ( high in leucine ; low in aromatic residues en no cysteine ) .
C0010834
cytoplasmic
C0007603
cell membrane