| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
aminolevulinic acid
Aminolevulinic Acid: A compound produced from succinyl-CoA and GLYCINE as an intermediate in heme synthesis. It is used as a PHOTOCHEMOTHERAPY for actinic KERATOSIS.. 5-aminolevulinic acid : The simplest delta-amino acid in which the hydrogens at the gamma position are replaced by an oxo group. It is metabolised to protoporphyrin IX, a photoactive compound which accumulates in the skin. Used (in the form of the hydrochloride salt)in combination with blue light illumination for the treatment of minimally to moderately thick actinic keratosis of the face or scalp. | 2 | 1 | 0 | 4-oxo monocarboxylic acid;
amino acid zwitterion;
delta-amino acid | antineoplastic agent;
dermatologic drug;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
photosensitizing agent;
plant metabolite;
prodrug;
Saccharomyces cerevisiae metabolite |
acetic acid
Acetic Acid: Product of the oxidation of ethanol and of the destructive distillation of wood. It is used locally, occasionally internally, as a counterirritant and also as a reagent. (Stedman, 26th ed). acetic acid : A simple monocarboxylic acid containing two carbons. | 3.4 | 1 | 1 | monocarboxylic acid | antimicrobial food preservative;
Daphnia magna metabolite;
food acidity regulator;
protic solvent |
glycine
[no description available] | 2.47 | 2 | 0 | alpha-amino acid;
amino acid zwitterion;
proteinogenic amino acid;
serine family amino acid | EC 2.1.2.1 (glycine hydroxymethyltransferase) inhibitor;
fundamental metabolite;
hepatoprotective agent;
micronutrient;
neurotransmitter;
NMDA receptor agonist;
nutraceutical |
hydroxylamine
amino alcohol : An alcohol containing an amino functional group in addition to the alcohol-defining hydroxy group. | 1.99 | 1 | 0 | hydroxylamines | algal metabolite;
bacterial xenobiotic metabolite;
EC 1.1.3.13 (alcohol oxidase) inhibitor;
EC 4.2.1.22 (cystathionine beta-synthase) inhibitor;
EC 4.3.1.10 (serine-sulfate ammonia-lyase) inhibitor;
nitric oxide donor;
nucleophilic reagent |
thiosulfates
Thiosulfates: Inorganic salts of thiosulfuric acid possessing the general formula R2S2O3.. thiosulfate(2-) : A divalent inorganic anion obtained by removal of both protons from thiosulfuric acid. | 1.99 | 1 | 0 | divalent inorganic anion;
sulfur oxide;
sulfur oxoanion | human metabolite |
sulfasalazine
Sulfasalazine: A drug that is used in the management of inflammatory bowel diseases. Its activity is generally considered to lie in its metabolic breakdown product, 5-aminosalicylic acid (see MESALAMINE) released in the colon. (From Martindale, The Extra Pharmacopoeia, 30th ed, p907). sulfasalazine : An azobenzene consisting of diphenyldiazene having a carboxy substituent at the 4-position, a hydroxy substituent at the 3-position and a 2-pyridylaminosulphonyl substituent at the 4'-position. | 1.98 | 1 | 0 | | |
aspartic acid
Aspartic Acid: One of the non-essential amino acids commonly occurring in the L-form. It is found in animals and plants, especially in sugar cane and sugar beets. It may be a neurotransmitter.. aspartic acid : An alpha-amino acid that consists of succinic acid bearing a single alpha-amino substituent. L-aspartic acid : The L-enantiomer of aspartic acid. | 2.49 | 2 | 0 | aspartate family amino acid;
aspartic acid;
L-alpha-amino acid;
proteinogenic amino acid | Escherichia coli metabolite;
mouse metabolite;
neurotransmitter |
methionine
Methionine: A sulfur-containing essential L-amino acid that is important in many body functions.. methionine : A sulfur-containing amino acid that is butyric acid bearing an amino substituent at position 2 and a methylthio substituent at position 4. | 1.99 | 1 | 0 | aspartate family amino acid;
L-alpha-amino acid;
methionine zwitterion;
methionine;
proteinogenic amino acid | antidote to paracetamol poisoning;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical |
histidine
Histidine: An essential amino acid that is required for the production of HISTAMINE.. L-histidine : The L-enantiomer of the amino acid histidine.. histidine : An alpha-amino acid that is propanoic acid bearing an amino substituent at position 2 and a 1H-imidazol-4-yl group at position 3. | 2.06 | 1 | 0 | amino acid zwitterion;
histidine;
L-alpha-amino acid;
polar amino acid zwitterion;
proteinogenic amino acid | algal metabolite;
Escherichia coli metabolite;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
Saccharomyces cerevisiae metabolite |
valine
Valine: A branched-chain essential amino acid that has stimulant activity. It promotes muscle growth and tissue repair. It is a precursor in the penicillin biosynthetic pathway.. valine : A branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by an isopropyl group.. L-valine : The L-enantiomer of valine. | 2.03 | 1 | 0 | L-alpha-amino acid zwitterion;
L-alpha-amino acid;
proteinogenic amino acid;
pyruvate family amino acid;
valine | algal metabolite;
Escherichia coli metabolite;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
Saccharomyces cerevisiae metabolite |
arginine
Arginine: An essential amino acid that is physiologically active in the L-form.. arginine : An alpha-amino acid that is glycine in which the alpha-is substituted by a 3-guanidinopropyl group. | 2.06 | 1 | 0 | arginine;
glutamine family amino acid;
L-alpha-amino acid;
proteinogenic amino acid | biomarker;
Escherichia coli metabolite;
micronutrient;
mouse metabolite;
nutraceutical |
melamine
melamine: RN given refers to parent cpd; structure. melamine : A trimer of cyanamide, with a 1,3,5-triazine skeleton. | 2.06 | 1 | 0 | triamino-1,3,5-triazine | xenobiotic metabolite |
methoxyhydroxyphenylglycol
Methoxyhydroxyphenylglycol: Synthesized from endogenous epinephrine and norepinephrine in vivo. It is found in brain, blood, CSF, and urine, where its concentrations are used to measure catecholamine turnover. | 2.06 | 1 | 0 | methoxybenzenes;
phenols | |
glycyl-glycyl-glycine
glycyl-glycyl-glycine : A tripeptide in which three glycine units are linked via peptide bonds in a linear sequence. | 2.42 | 2 | 0 | tripeptide zwitterion;
tripeptide | |
glycylglycine
[no description available] | 2.69 | 3 | 0 | dipeptide zwitterion;
dipeptide | human metabolite |
sodium thiosulfate
sodium thiosulfate: do not confuse synonym sodium hyposulfite with sodium hyposulfite, synonym for di-Na salt of dithionous acid. sodium thiosulfate : An inorganic sodium salt composed of sodium and thiosulfate ions in a 2:1 ratio. | 1.99 | 1 | 0 | inorganic sodium salt | antidote to cyanide poisoning;
antifungal drug;
nephroprotective agent |
urobilinogen
Urobilinogen: A colorless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidized to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. At times, it is re-excreted in the urine, where it may be later oxidized to urobilin.. urobilinogen : A member of the class of bilanes that is a colourless product formed in the intestine by the reduction of bilirubin. | 1.98 | 1 | 0 | bilanes | human metabolite |
omega-aminocaprylic acid
8-aminooctanoic acid : An omega-amino fatty acid that is octanoic acid which carries an amino group at position 8. | 2 | 1 | 0 | medium-chain fatty acid;
omega-amino fatty acid | human metabolite |
glycyl-glycyl-glycyl-glycine
[no description available] | 2.03 | 1 | 0 | | |
leucyltyrosine
leucyltyrosine: RN given refers to L-Tyr,L-Leu-isomer; RN for cpd without isomeric designation not avail 4/93 | 1.98 | 1 | 0 | dipeptide | metabolite |
tyrosyltyrosine
tyrosyltyrosine: RN given refers to all-(L)-isomer. tyrosyltyrosine : A dipeptide comprising tyrosine with a tyrosyl residue attached to the alpha-nitrogen.. Tyr-Tyr : Tyrosyltyrosine in which each tyrosine residue has L-configuration. | 2.03 | 1 | 0 | tyrosyltyrosine | Mycoplasma genitalium metabolite |
ubenimex
ubenimex: growth inhibitor | 2 | 1 | 0 | | |
leucylleucine
Leu-Leu : A dipeptide formed from two L-leucine residues. | 2.41 | 2 | 0 | dipeptide;
L-aminoacyl-L-amino acid zwitterion | human metabolite;
Mycoplasma genitalium metabolite |
phenylalanylleucine
phenylalanylleucine: RN given refers to (L)-isomer | 1.98 | 1 | 0 | dipeptide zwitterion;
dipeptide | plant metabolite |
leucyl-alanine
Leu-Ala : A dipeptide composed of L-leucine and L-alanine joined by a peptide linkage. | 1.98 | 1 | 0 | dipeptide | metabolite |
phenylalanylphenylalanylamide
[no description available] | 2.03 | 1 | 0 | | |
tyrosylleucine
[no description available] | 1.98 | 1 | 0 | dipeptide | metabolite |
Trp-Trp
tryptophyltryptophan: an antigelation agent. Trp-Trp : A dipeptide formed from two L-tryptophan residues. | 2.41 | 2 | 0 | dipeptide | Mycoplasma genitalium metabolite |
homocysteine
Homocysteine: A thiol-containing amino acid formed by a demethylation of METHIONINE.. homocysteine : A sulfur-containing amino acid consisting of a glycine core with a 2-mercaptoethyl side-chain.. L-homocysteine : A homocysteine that has L configuration. | 2.06 | 1 | 0 | amino acid zwitterion;
homocysteine;
serine family amino acid | fundamental metabolite;
mouse metabolite |
glycyltryptophan
glycyltryptophan: RN given refers to (L)-isomer. Gly-Trp : A dipeptide formed from glycine and L-tryptophan residues. | 2.69 | 3 | 0 | dipeptide | metabolite |
glycyltyrosine
Gly-Tyr : A dipeptide composed of glycine and L-tyrosine joined by a peptide linkage. | 2.69 | 3 | 0 | dipeptide | metabolite |
glycylleucine
Gly-Leu : A dipeptide composed of glycine and L-leucine joined by a peptide linkage. | 2.69 | 3 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
alanyltyrosine
alanyltyrosine: tyrosine source; RN given refers to (L)-isomer. Ala-Tyr : A dipeptide composed of L-alanine and L-tyrosine joined by a peptide linkage. | 2.41 | 2 | 0 | dipeptide | metabolite |
glycyl-l-phenylalanine
glycylphenylalanine: RN given refers to (DL)-isomer. Gly-Phe : A dipeptide formed from glycine and L-phenylalanine residues. | 2.69 | 3 | 0 | dipeptide zwitterion;
dipeptide | human metabolite;
metabolite |
glycylsarcosine
glycylsarcosine : A dipeptide obtained by formal condensation of the carboxy group of glycine with the amino group of sarcosine. | 2.03 | 1 | 0 | dipeptide zwitterion;
dipeptide | |
alanylphenylalanine
alanylphenylalanine: RN given refers to (L-Ala-L-PheAla)-isomer | 2.41 | 2 | 0 | dipeptide | metabolite |
glycyl-leucyl-tyrosine
glycyl-leucyl-tyrosine: structure given in first source | 2 | 1 | 0 | oligopeptide | |
tryptophylglycine
Trp-Gly : A dipeptide formed from L-tryptophan and glycine residues. | 2.41 | 2 | 0 | dipeptide | metabolite |
glycylaspartic acid
glycylaspartic acid: RN given refers to (L)-isomer | 2.69 | 3 | 0 | dipeptide | metabolite |
n-glycylglutamic acid
N-glycylglutamic acid: RN given refers to (L)-isomer. Gly-Glu : A dipeptide formed from glycyl and L-glutamic acid residues. | 2.41 | 2 | 0 | dipeptide | metabolite |
beta-aspartylglycine
beta-aspartylglycine: found in cecum of germ-free & antibiotic-treated mice; RN given refers to (L-beta)-isomer | 2 | 1 | 0 | dipeptide | |
histidylglycine
histidylglycine: RN given refers to all (L)-isomer. His-Gly : A dipeptide formed from L-histidine and glycine residues. | 2.41 | 2 | 0 | dipeptide | metabolite |
valylvaline
valylvaline: RN given refers to (L)-isomer. Val-Val : A dipeptide formed from two L-valine residues. | 2.41 | 2 | 0 | dipeptide | Mycoplasma genitalium metabolite |
proctolin
proctolin: neurotransmitter in arthropods or invertebrates | 1.98 | 1 | 0 | | |
glycylglutamine
glycylglutamine: inhibitory neuropeptide derived from beta-endorphin; RN given refers to (L)-isomer | 2.72 | 3 | 0 | dipeptide zwitterion;
dipeptide | metabolite;
protective agent |
glycyl-leucyl-phenylalanine
glycyl-leucyl-phenylalanine: an immunostimulatory peptide; RN given refer to all (L)-isomer | 2.03 | 1 | 0 | oligopeptide | |
lysyllysine
lysyllysine: RN given refers to (L-Lys)-isomer. Lys-Lys : A dipeptide formed from two L-lysine residues. | 2.42 | 2 | 0 | dipeptide | Mycoplasma genitalium metabolite |
proline
Proline: A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons.. proline : An alpha-amino acid that is pyrrolidine bearing a carboxy substituent at position 2. | 2.06 | 1 | 0 | amino acid zwitterion;
glutamine family amino acid;
L-alpha-amino acid;
proline;
proteinogenic amino acid | algal metabolite;
compatible osmolytes;
Escherichia coli metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
Saccharomyces cerevisiae metabolite |
phenylalanylarginine
phenylalanylarginine: RN given refers to all (L)-isomer. Phe-Arg : A dipeptide composed of L-phenylalanine and L-arginine joined by a peptide linkage. | 1.98 | 1 | 0 | dipeptide | metabolite |
alanine-4-nitroanilide
alanine-4-nitroanilide: substrate for aminopeptidase M | 2 | 1 | 0 | | |
arginylarginine
Arg-Arg : A dipeptide formed from two L-arginine residues. | 2.03 | 1 | 0 | dipeptide | Mycoplasma genitalium metabolite |
prolyl-tyrosine
prolyl-tyrosine: structure given in first source. Pro-Tyr : A dipeptide formed from L-proline and L-tyrosine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
n-valyltryptophan
N-valyltryptophan: RN given refers to (L)-isomer | 2.41 | 2 | 0 | peptide | |
histidylleucine
His-Leu : A dipeptide formed from L-histidine and L-leucine residues. | 1.98 | 1 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
prolylglutamic acid
Pro-Glu : A dipeptide formed from L-proline and L-glutamic acid residues. | 2.03 | 1 | 0 | dipeptide | metabolite |
carnosine
polaprezinc: stimulates bone growth | 2 | 1 | 0 | amino acid zwitterion;
dipeptide | anticonvulsant;
antineoplastic agent;
antioxidant;
Daphnia magna metabolite;
geroprotector;
human metabolite;
mouse metabolite;
neuroprotective agent |
glutamyl-glutamic acid
glutamyl-glutamic acid: RN given for (L,L)-isomer. Glu-Glu : A dipeptide composed of two L-glutamic acid units joined by a peptide linkage. | 2.03 | 1 | 0 | dipeptide | Mycoplasma genitalium metabolite |
isoleucylvaline
isoleucylvaline: RN given refers to all (L)-isomer. Ile-Val : A dipeptide formed from L-isoleucine and L-valine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
aspartyl-aspartic acid
aspartyl-aspartic acid: do not confuse with cyclo(Asp-Asp). Asp-Asp : A dipeptide formed from two L-aspartic acid units. | 2.42 | 2 | 0 | dipeptide | Mycoplasma genitalium metabolite |
Phe-Tyr
Phe-Tyr : A dipeptide formed from L-phenylalanine and L-tyrosine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
n-glycylalanine
Gly-Ala : A dipeptide formed from glycine and L-alanine residues. | 2.41 | 2 | 0 | dipeptide | metabolite |
glycylvaline
glycylvaline: RN given refers to (DL)-isomer | 1.98 | 1 | 0 | dipeptide | human metabolite |
glycylproline
Gly-Pro : A dipeptide consisting of L-proline having a glycyl residue attached to its alpha-amino group. | 2.41 | 2 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
glycyllysine
glycyllysine: RN given refers to (L)-isomer. Gly-Lys : A dipeptide formed from glycine and L-lysine residues. | 2.69 | 3 | 0 | dipeptide | metabolite |
bilirubin
[no description available] | 1.97 | 1 | 0 | biladienes;
dicarboxylic acid | antioxidant;
human metabolite;
mouse metabolite |
vitamin k semiquinone radical
vitamin K semiquinone radical: found in active preparations of vitamin K-dependent carboxylase. vitamin K : Any member of a group of fat-soluble 2-methyl-1,4-napthoquinones that exhibit biological activity against vitamin K deficiency. Vitamin K is required for the synthesis of prothrombin and certain other blood coagulation factors. | 2.06 | 1 | 0 | | |
alanylalanine
L-alanyl-L-alanine : A dipeptide consisting of two L-alanine units joined by a peptide linkage. | 2.41 | 2 | 0 | dipeptide zwitterion;
dipeptide | Mycoplasma genitalium metabolite |
phenylalanylalanine
phenylalanylalanine: RN given refers to (L)-isomer. Phe-Ala : A dipeptide formed from L-phenylalanine and L-alanine residues. | 2.03 | 1 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
alpha-aspartylalanine
alpha-aspartylalanine: found in pig brain. Asp-Ala : A dipeptide formed from L-alpha-aspartyl and L-valine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
alanyltyrosine
Tyr-Ala : A dipeptide formed from L-tyrosine and L-alanine residues. | 2.41 | 2 | 0 | dipeptide | metabolite |
urobilin
[no description available] | 3.4 | 1 | 1 | | |
prolylglycine
prolylglycine: RN given refers to (L)-isomer. L-prolylglycine : A dipeptide consisting of glycine having an L-prolyl group attached to its alpha-amino nitrogen. | 2.69 | 3 | 0 | dipeptide zwitterion;
dipeptide | |
arginyllysine
Arg-Lys : A dipeptide formed from L-arginyl and L-leucine residues. | 2.03 | 1 | 0 | dipeptide | metabolite |
cholestanol
Cholestanol: A cholesterol derivative found in human feces, gallstones, eggs, and other biological matter. | 1.98 | 1 | 0 | cholestanoid | |
phenylalanylglycine
phenylalanylglycine: RN given refers to (DL)-isomer. Phe-Gly : A dipeptide formed from L-phenylalanine and glycine residues. | 2.69 | 3 | 0 | dipeptide | metabolite |
leucyl-phenylalanine
Leu-Phe : A dipeptide formed from L-leucine and L-phenylalanine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
glutamylalanine
Glu-Ala : A dipeptide formed from L-alpha-glutamyl and L-alanine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
glutaminyl-glycine
Gln-Gly : A dipeptide formed from L-glutamine and glycine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
methionylglycine
methionylglycine: RN given refers to (L)-isomer. Met-Gly : A dipeptide formed from L-methionine and glycine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
phenylalanylphenylalanine
Phe-Phe : A dipeptide formed from two L-phenylalanine residues. | 1.98 | 1 | 0 | dipeptide;
L-aminoacyl-L-amino acid zwitterion | human blood serum metabolite;
Mycoplasma genitalium metabolite |
histidylhistidine
histidylhistidine: RN given for L-,L-isomer | 2.03 | 1 | 0 | dipeptide | Mycoplasma genitalium metabolite |
valylleucine
valylleucine: RN given refers to all L-isomer. Val-Leu : A dipeptide formed from L-valine and L-leucine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
phenylalanyl-valine
Val-Phe : A dipeptide formed from L-valine and L-phenylalanine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
alanylglycine
[no description available] | 1.98 | 1 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
valyltyrosine
valyltyrosine: from sardine muscle hydrolyzate. Val-Tyr : A dipeptide formed from L-valine and L-tyrosine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
alpha-glutamyltryptophan
Trp-Glu : A dipeptide formed from L-tryptophan and L-glutamic acid residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
lysylglutamic acid
lysylglutamic acid: a geroprotective agent. Lys-Glu : A dipeptide formed from L-lysine and L-glutamic acid residues. | 2.03 | 1 | 0 | dipeptide | metabolite |
Ala-Lys
Ala-Lys : A dipeptide obtained by formal condensation of the carboxy group of L-alanine with the alpha-amino group of L-lysine. | 2.03 | 1 | 0 | dipeptide | marine metabolite |
valyl-valyl-valine
[no description available] | 2.03 | 1 | 0 | peptide | |
lysylglycine
lysylglycine: structure in first source. Lys-Gly : A dipeptide formed from L-lysine and glycine residues. | 3.12 | 5 | 0 | dipeptide | metabolite |
glycylhistidine
glycylhistidine: RN given refers to (L)-isomer. Gly-His : A dipeptide composed of glycine and L-histidine joined by a peptide linkage. | 2.69 | 3 | 0 | dipeptide zwitterion;
dipeptide | metabolite |
isoleucyl-tyrosine
isoleucyl-tyrosine: a dipeptide with antihypertensive effect. Ile-Tyr : A dipeptide formed from L-isoleucine and L-tyrosine residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
prolyl-serine
Pro-Ser : A dipeptide formed from L-proline and L-serine residues. | 2.03 | 1 | 0 | dipeptide | metabolite |
prolylvaline
Val-Pro : A dipeptide formed from L-valine and L-proline residues. | 1.98 | 1 | 0 | dipeptide | metabolite |
prolyl-proline
Pro-Pro : A dipeptide formed from two L-proline residues. | 2.03 | 1 | 0 | dipeptide | human urinary metabolite;
Mycoplasma genitalium metabolite |
hypoxanthine
[no description available] | 2.06 | 1 | 0 | nucleobase analogue;
oxopurine;
purine nucleobase | fundamental metabolite |