L-Citrulline-13C 是带有 13C 标记的 L-Citrulline。L-Citrulline 是一种氨基酸，源自于脯氨酸、谷氨酰胺和谷氨酸盐的分解代谢过程中产生的鸟氨酸，或通过精氨酸-瓜氨酸途径获得的 l-精氨酸。 L-Citrulline-13C is the 13C-labeled L-Citrulline. L-Citrulline is an amino acid derived from ornithine in the catabolism of proline or glutamine and glutamate, or from l-arginine via arginine-citrulline pathway.