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                  Biological Magnetic Resonance Data BankA Repository for Data from NMR Spectroscopy on Proteins, Peptides, Nucleic Acids, and other Biomolecules  | 
                
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	Hypermethioninemia is an excess of a particular protein building block (amino acid), called methionine, in the blood. This condition can occur when methionine is not broken down (metabolized) properly in the body.
| Gene Name | Chromosome number | 
|---|---|
| GNMT | 6 | 
| MAT1A | 10 | 
| AHCY | 202 |