Adenosylhomocysteinase (UniProt: P23526; also known as EC: 3.3.1.1, AdoHcyase, S-adenosyl-L-homocysteine hydrolase) is encoded by the AHCY (also known as SAHH) gene (Gene ID: 191) in human. Adenosylhomocysteinase is a homotetrametic enzyme that catalyzes the reversible hydrolysis of S-adenosylhomocysteine to adenosine and L-homocysteine. Hence, it regulates the intracellular S-adenosylhomocysteine concentration, which is thought to be important for transmethylation reactions. Two isoforms of adenosylhomocysteinase have been reported that are produced by alternative splicing. It contains three nucleotide binding regions (aa 157-159; 222-227; and 299-301). Defects in AHCY gene cause hypermethioninemia that is characterized with failure to thrive, mental and motor retardation, facial dysmorphism with abnormal hair and teeth, and myocardiopathy.，官网链接：https://www.sigmaaldrich.cn/product/mm/abe1803 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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