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  • Title: Insulin-dependent and insulin-independent low Km cyclic AMP phosphodiesterase from rat adipose tissue.
    Author: Weber HW, Appleman MM.
    Journal: J Biol Chem; 1982 May 25; 257(10):5339-41. PubMed ID: 6279596.
    Abstract:
    Chromatographic analysis of a soluble extract of rat adipose tissue on DEAE-Sephacel resolves four distinct peaks of 3':5'-nucleotide phosphodiesterase (EC 3.1.4.17) activity. Kinetic investigation indicates that two of these fractions have a high affinity for cyclic AMP and show negative cooperative kinetic behavior at high substrate concentration. They differ in the degree of inhibition by cyclic GMP and in their response to insulin. If rat epididymal fat pads are incubated with insulin prior to homogenization, only one of the low Km cyclic AMP phosphodiesterase forms is stimulated.
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