| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
hydrogen
Hydrogen: The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.. dihydrogen : An elemental molecule consisting of two hydrogens joined by a single bond. | 2.31 | 1 | 0 | elemental hydrogen;
elemental molecule;
gas molecular entity | antioxidant;
electron donor;
food packaging gas;
fuel;
human metabolite |
quinone
benzoquinone : The simplest members of the class of benzoquinones, consisting of cyclohexadiene which is substituted by two oxo groups.. 1,4-benzoquinone : The simplest member of the class of 1,4-benzoquinones, obtained by the formal oxidation of hydroquinone to the corresponding diketone. It is a metabolite of benzene.. quinone : Compounds having a fully conjugated cyclic dione structure, such as that of benzoquinones, derived from aromatic compounds by conversion of an even number of -CH= groups into -C(=O)- groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included). | 2.17 | 1 | 0 | 1,4-benzoquinones | cofactor;
human xenobiotic metabolite;
mouse metabolite |
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. | 7.05 | 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 |
cadmium
Cadmium: An element with atomic symbol Cd, atomic number 48, and atomic weight 112.41. It is a metal and ingestion will lead to CADMIUM POISONING.. elemental cadmium : An element in the zinc group of the periodic table with atomic number 48, atomic mass 112, M.P. 321degreeC, and B.P. 765degreeC). An odourless, tasteless, and highly poisonous soft, ductile, lustrous metal with electropositive properties. It has eight stable isotopes: (106)Cd, (108)Cd,(110)Cd, (111)Cd, (112)Cd, (113)Cd, (114)Cd and (116)Cd, with (112)Cd and (114)Cd being the most common. | 2.01 | 1 | 0 | cadmium molecular entity;
zinc group element atom | |
porphycene
porphycene: photodynamic therapy agent; structure given in first source | 2.31 | 1 | 0 | | |
bacteriopheophytin
bacteriopheophytin: pigment which is the degradation product of bacteriochlorophyll; structure. bacteriopheophytin a : A bacteriopheophytin consisting of bacteriochlorophyll a with two hydrogen atoms replacing the magnesium centre.. bacteriopheophytin : A cyclic tetrapyrrole comprising any bacteriochlorophyll molecule with two hydrogen atoms replacing the magnesium centre. | 7.41 | 1 | 0 | | |
lead
Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb. | 2.31 | 1 | 0 | carbon group element atom;
elemental lead;
metal atom | neurotoxin |
sulfur
Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine. | 7.41 | 2 | 0 | chalcogen;
nonmetal atom | macronutrient |
bacteriochlorophylls
Bacteriochlorophylls: Pyrrole containing pigments found in photosynthetic bacteria. | 4.47 | 21 | 0 | | |
bacteriochlorophylls
Bacteriochlorophyll A: A specific bacteriochlorophyll that is similar in structure to chlorophyll a.. bacteriochlorophyll : Chlorophylls of photosynthetic bacteria. | 3.03 | 4 | 0 | bacteriochlorophyll;
methyl ester | |
chlorophyll a
Chlorophyll: Porphyrin derivatives containing magnesium that act to convert light energy in photosynthetic organisms.. chlorophyll : A family of magnesium porphyrins, defined by the presence of a fifth ring beyond the four pyrrole-like rings. The rings can have various side chains which usually include a long phytol chain. | 2.08 | 1 | 0 | chlorophyll;
methyl ester | cofactor |
phthalocyanine
phthalocyanine : A tetrapyrrole fundamental parent that consists of four isoindole-type units, with the connecting carbon atoms in the macrocycle replaced by nitrogen. | 2.31 | 1 | 0 | phthalocyanines;
tetrapyrrole fundamental parent | |