1. The level of Leu-en-kephalin in plasma was also increased.
   外周静脉血与肾静脉血中无显著差别。
2. Methods Plasma β-en dorphin, leu-enkephalin and dynorphin A1-13 were estimated by RIA.
   方法用放射免疫法测定β-内啡肽、亮啡肽及强啡肽A1-13。

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