Abstract
The incubation of camel lens cortex homogenate with 100 microM ferrous ions and 5.5 mM glucose under sterile conditions caused rapid protein aggregation, but little or no reaction was seen with either 100 microM ferrous ions or 5.5 mM glucose alone. The formation of glycosylated high molecular weight (HMW) protein aggregates was confirmed by light scattering studies, a decreased level of free -SH groups, incorporation of [14C]-glucose and elution of HMW protein aggregate just after the void volume of a Sephacryl S-1000 column. The bonding involved in the formation of these aggregates was found to be mainly disulfide in nature. Isoelectric focusing (IEF) in the presence and absence of reducing conditions indicated that gamma-crystallins may be involved in the formation of HMW protein aggregates. The modifications observed were found to mimic those seen in cataractous lenses.
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