Abstract
Complexes containing alpha-crystallin were isolated from crosslinked lens extract using an affinity column constructed with monoclonal antibodies specific for alpha-crystallin. The affinity-purified protein was compared with alpha-crystallins before and after crosslinking. Electron microscopy revealed sheet-like structures in the cross-linked protein from the lens extract compared with spherical structures for the others. Studies on the amino acid composition, tryptophan microenvironments and the interaction with a monoclonal antibody revealed that the complexes consist almost entirely of alpha-crystallin. These results indicate that under certain conditions, alpha-crystallin subunits can adopt a sheet-like form.
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