γ-Glutamylmethylamide (gamma-Glutamylmethylamide, abbrev. GMA, synonyms N-methyl-L-glutamine, metheanine) is an amino acid analog of the proteinogenic amino acids L-glutamic acid and L-glutamine, found primarily in plant and fungal species; simply speaking, it is L-glutamine methylated on the amide nitrogen. It is an identified an important biosynthetic intermediate allowing bacteria (e.g., methanotrophs) use of methylated amines as carbon and nitrogen source for growth (and so of significant biotechnological interest).[non-primary source needed] Like its close relative theanine, it is a pharmacologically active constituent of green tea, with preliminary evidence for at least comparable activity to theanine as a hypotensive.[non-primary source needed]

CAS：3081-62-7
中文别名：
英文别名：N-Methylglutamine;N5-methyl-L-glutamine;L-2-Amino-glutarsaeure-5-methylamid;gamma-glutamylmethylamide;N5-Methyl-L-glutamin;GlutaMylMethylaMide;
分子式：C6H10N2O4
分子量：174.155
精确质量：174.064
Psa：123.48
Logp：-0.3665

密度：1.211g/cm3
沸点：427.5ºC at 760mmHg
闪点：212.4ºC
折射率：1.494

海关编码：2924199090