Exact Mass: 256.1171
Exact Mass Matches: 256.1171
Found 28 metabolites which its exact mass value is equals to given mass value 256.1171,
within given mass tolerance error 0.001 dalton. Try search metabolite list with more accurate mass tolerance error
0.0002 dalton.
(2S)-2-azanyl-4-[[(2R)-3-(1H-imidazol-4-yl)-1-oxidanyl-1-oxidanylidene-propan-2-yl]amino]butanoic acid
Threonylhistidine
Threonylhistidine is a dipeptide composed of threonine and histidine. It is an incomplete breakdown product of protein digestion or protein catabolism. Dipeptides are organic compounds containing a sequence of exactly two alpha-amino acids joined by a peptide bond. Some dipeptides are known to have physiological or cell-signalling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.
2-(3-Carboxy-3-aminopropyl)-L-histidine
2-(3-Carboxy-3-aminopropyl)-L-histidine is an unusual amino acid that results from the post-translational modification of histidine in certain proteins. In particular, it is a post-translational derivative of histidine that exists in protein synthesis elongation factor 2 (EF2) at the site of diphtheria toxin-catalyzed ADP-ribosylation of elongation factor 2. It is a precursor for diphthamide. This compound is a substrate for the enzyme diphthine synthase (EC 2.1.1.98). This enzyme catalyzes the chemical reaction: S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine = S-adenosyl-L-homocysteine + 2-[3-carboxy-3-(methylammonio)propyl]-L-histidine. [HMDB] 2-(3-Carboxy-3-aminopropyl)-L-histidine is an unusual amino acid that results from the post-translational modification of histidine in certain proteins. In particular, it is a post-translational derivative of histidine that exists in protein synthesis elongation factor 2 (EF2) at the site of diphtheria toxin-catalyzed ADP-ribosylation of elongation factor 2. It is a precursor for diphthamide. This compound is a substrate for the enzyme diphthine synthase (EC 2.1.1.98). This enzyme catalyzes the chemical reaction: S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine = S-adenosyl-L-homocysteine + 2-[3-carboxy-3-(methylammonio)propyl]-L-histidine.
Histidylthreonine
Histidylthreonine is a dipeptide composed of histidine and threonine. It is an incomplete breakdown product of protein digestion or protein catabolism. Dipeptides are organic compounds containing a sequence of exactly two alpha-amino acids joined by a peptide bond. Some dipeptides are known to have physiological or cell-signalling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.
THR-His
A dipeptide composed of L-threonine and L-histidine joined by a peptide linkage.
(2S,4S)-1-(tert-Butoxycarbonyl)-4-azidopyrrolidine-2-carboxylic acid
N-(Trimethylsilyl)-4-[(trimethylsilyl)oxy]-1,3,5-triazin-2-amine
Methanone,1,1-(1,2-diazenediyl)bis[1-(4-morpholinyl)-
(2S)-2-amino-4-{[(1R)-1-carboxy-2-(1H-imidazol-4-yl)ethyl]amino}butanoate
(2S)-2-amino-4-{[(1S)-1-carboxy-2-(1H-imidazol-4-yl)ethyl]amino}butanoate
2-azaniumyl-4-{5-[(2S)-2-azaniumyl-2-carboxylatoethyl]-1H-imidazol-2-yl}butanoate
2-[(3S)-3-amino-3-carboxypropyl]-L-histidine
A 2-(3-amino-3-carboxypropyl)-L-histidine in which position 3 on the side-chain has S-configuration.
(2S)-2-azaniumyl-4-{5-[(2S)-2-azaniumyl-2-carboxylatoethyl]-1H-imidazol-2-yl}butanoate
2-[(3S)-3-amino-3-carboxypropyl]-L-histidine dizwitterion
A 2-(3-amino-3-carboxypropyl)-L-histidine dizwitterion arising from transfer of two protons from the carboxy to the amino groups of 2-[(3S)-3-amino-3-carboxypropyl]-L-histidine.
beta-aminopropionitrile hemifumarate
A fumarate salt prepared from beta-aminopropionitrile by reaction of one molecule of fumaric acid for every two molecules of beta-aminopropionitrile.
2-(3-amino-3-carboxypropyl)-L-histidine dizwitterion
A dizwitterionic form of 2-(3-amino-3-carboxypropyl)-L-histidine arising from transfer of two protons from the carboxy to the amino groups; major species at pH 7.3.
