Collect. Czech. Chem. Commun. 1981, 46, 520-524

Decyclizing phosphodiesterases associated with plasma membranes of the chick chorioalantois

Svetlana Pristašováa, Marta Rosenbergováa and Antonín Holý

a Virological Institute, Slovak Academy of Sciences, Bratislava


Two different enzymatic activities hydrolyzing 2',3'-cyclic phosphates of purine and pyrimidine ribonucleosides to give 2'- or 3'-ribonucleotides have been detected in plasma membranes of the chick chorioalantois. The enzymes differ in their temperature optima: At lower temperatures, cleavage to the 2'-isomers predominates.