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. 2016 Nov 25;6:36541. doi: 10.1038/srep36541

Figure 4. CPSI is related to the urea cycle that regulates NO production.

Figure 4

CPSI is the rate limiting step in the urea cycle, and it was found down-regulated in the plasma of CHD-PAH in our study. ASS, argininosuccinate synthase; ASL, argininosuccinate lyase; NOS, nitric oxide synthase; OTC, ornithine transcarbamylase. (The diagram is modified from Pearson DL. et al.22).