Abstract
The conformational changes induced in Fab fragments of polyclonal anti-RNase antibody molecules obtained by digestion with papain as a result of binding of pancreatic RNase have been studied. The RNase-Fab complex (RN-Fab), being soluble, could be subjected to thermodynamic investigations using optical strategies, also because of the absence of tryptophan in RNase. Internalization of the chromophores (tryptophans and tyrosines) of Fab occurs when it binds to RNase, suggesting an increase in the compactness of Fab due to the binding of RNase.
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