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1·Secondly the enzyme is inhibited by an intermediate lower down the metabolic pathway, usually either phosphoenolpyruvate or citrate.

其次，减缓代谢途径的一个中间体，通常是磷酸烯醇或柠檬酸降低酶的活性。

2·Since leaving metabolic diseases, hyperthyroidism, resulting in accumulation of intermediate metabolites in the brain.

由于疾病而使代谢亢进，造成中间代谢产物在脑内蓄积。

3·Description Pyruvate is a key intermediate in cellular metabolic pathways.

丙酮酸在细胞代谢中起关键作用。