No abstract available
MeSH terms
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Aged
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Autoradiography
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Colon, Sigmoid / metabolism*
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Enkephalin, Leucine / analogs & derivatives
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Enkephalin, Leucine / pharmacology
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Enkephalin, Leucine-2-Alanine
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Humans
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In Vitro Techniques
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Middle Aged
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Receptors, Opioid / metabolism*
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Receptors, Opioid, delta
Substances
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Receptors, Opioid
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Receptors, Opioid, delta
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Enkephalin, Leucine
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Enkephalin, Leucine-2-Alanine