Dec 1, 1975

A rapid method for measuring guanylate cyclase activity in mammary tissue

Proceedings of the Society for Experimental Biology and Medicine
R D Smith, J A Rillema


A simple and rapid method for measuring guanylate cyclase activity in broken cell preparations of biological tissues is described. This method employs the rate of conversion of [32P]GTP to [32P]cyclic-GMP. The product of this reaction is isolated by ion-exchange chromatography and by a ZnSO4-Ba(OH)2 precipitation at pH 5.7. Using this method, about 30-50 samples can be assayed for guanylate cyclase activity during a 5-6 hr period. The characteristics of this enzyme in the mammary gland were found to be similar to those described for other tissues using different methods for measuring guanylate cyclase activity.

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Mentioned in this Paper

Mammary Gland
Rapid Technique
Guanylate Cyclase Activity
Biological Tissue
Guanylate Cyclase
Ion-Exchange Chromatography Procedure

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