in single muscle cells isolated by enzymatic digestion from the les and the body of the esophagus , blockade of extracellular ca2+ influx by methoxyverapamil ( d 600 ) or ethyleneglycol-bis- ( beta-aminoethylether ) n , n'-tetraacetic acid abolished esophageal contraction in response to acetylcholine without affecting les cells , and conversely , strontium abolished les contraction without affecting esophageal cells .
C0014876
esophagus
C0227192
les