Proline was synthesized from glutamate or Ornithine, and degraded into glutamate, organic acid, as well as CO_2. P5C play a key role in the proline metabolism.

• 脯氨酸是由谷氨酸或鸟氨酸合成的,分解为谷氨酸、有机酸和CO_2。P5C在脯氨酸代谢中起中心作用。