The product was identified to be L-Cysteine based on thin layer chromatography, optical rotation and HPLC studies.

酶促反应后的产物经薄层层析、旋光度法和高效液相色谱鉴定为L -半胱氨酸。

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CONCLUSION: After high dose of L-dopa intervention, rotation behavior of PD rats improves, and D2 receptor is down-regulated significantly.

结论：大剂量左旋多巴干预能明显改善PD大鼠的旋转行为，并使纹状体多巴胺d2受体明显下调。

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