File:Methionine-metabolism.jpg

Title: (or description)
Methionine metabolic pathway.

Key 1. Cystathionine beta-synthase (CBS) 2. methionine adenosyltransferase I/III 3. methionine adenosyltransferase II 4. glycine N-methyltransferase 5. numerous methyltransferases; 6. S-adenosylhomocysteine hydrolase 7. methionine synthase 8. betaine-homocysteine methyltransferase; 9. Serine hydroxymethyltransferase 10. methylenetetrahydrofolate reductase; 11, cystathionine gamma-lyase
 * SAM: S-adenosylmethionine (SAM-e)
 * SAH: S-adenosylhomocysteine
 * THF: tetrahydrofolate
 * MeCbl: methylcobalamin

Author: (or citation)
Morris, Andrew A. M.; Kožich, Viktor; Santra, Saikat; Andria, Generoso; Ben-Omran, Tawfeg I. M.; Chakrapani, Anupam B.; Crushell, Ellen; Henderson, Mick J.; Hochuli, Michel (2017). "Guidelines for the diagnosis and management of cystathionine beta-synthase deficiency". Journal of Inherited Metabolic Disease. 40 (1): 49–74. doi:10.1007/s10545-016-9979-0. ISSN 0141-8955. PMC 5203861 Freely accessible. PMID 27778219.

Source: (e.g. internet address)
[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5203861/ Journal of Inherited Metabolic Disease 40(1):49-74 doi: 10.1007/s10545-016-9979-0