Different effects of current strength on inhibitory responses of the mouse vas deferens to methionine- and leucine-enkephalin
- PMID: 526704
- PMCID: PMC2043713
- DOI: 10.1111/j.1476-5381.1979.tb10838.x
Different effects of current strength on inhibitory responses of the mouse vas deferens to methionine- and leucine-enkephalin
Abstract
The inhibitory potency of methionine (Met)-enkephalin on the field-stimulated mouse vas deferens was greatly increased by a reduction in current strength whilst that of leucine (Leu)-enkephalin increased only slightly. All currents were submaximal and all muscle twitches were neuronally evoked. These results suggest that inhibitory effects of Met- and Leu-enkephalin in the mouse vas deferens are not commonly mediated and provide a rapid method for ascertaining heterogeneity of enkephalin extracts.
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