Abstract
Three peptides complementary to exposed regions of two low-M(r) phosphotyrosine protein phosphatase isoenzymes and of the acylphosphatase muscle isoenzyme have been synthesized. Each peptide was synthesized on two different types of resins; the peptides were anchored to the resins by amide linkages. The peptide resins were checked by amino acid analysis and Edman degradation and directly used for enzyme purification. Despite our attempts, none of the resins was able to bind significant amounts of the corresponding protein, indicating the lack of interaction between the three proteins and the corresponding complementary peptides. This result agrees with many other reports, confirming that the molecular-recognition theory has no general validity.
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