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. Author manuscript; available in PMC: 2018 Feb 17.
Published in final edited form as: J Mol Biol. 2016 Dec 21;429(4):543–561. doi: 10.1016/j.jmb.2016.12.015

Figure 1.

Figure 1

Intracellular syntheis of H2S by CBS, CSE and MST. L-cysteine serves as a substrate for all three enzymes to produce H2S in cells; however, homocysteine can be used as a substrate to synthesize H2S by the enzymatic activity of CSE and CBS.