【单选题】【消耗次数：1】
生物体内氨基酸脱氨的最主要方式是：
①
嘌呤核苷酸循环
②
L-谷氨酸脱氨
③
转氨基作用
④
鸟氨酸循环
⑤
联合脱氨基作用
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相关题目
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转氨基作用之所以不是氨基酸的主要脱氨基方式是由于().
①
A.转氨酶在生物体内分布不广泛
②
B.转氨酶的专一性强，只作用与少数氨基酸
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