Chemical and Enzymatic Factors

Tissue enzymes generally affect vasopressin in a manner analogous to ocytocin. However, the experiments in this field have been performed with impure preparations of both of the peptides, and it might therefore be useful to confirm these results with pure peptide preparations. 

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The stability of a drug in the gut is influenced by both chemical and enzymatic factors. Protection from chemical degradation may be accomplished via coating... 

Physico-chemical and enzymatic factors affecting fruit stability... 

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