Molecules

Articles

• acetyl-CoA
  2 June 2004

  Acetyl CoA

• lipids
  4 June 2003

  WKP
  Definition: Lipids are a broad group of naturally-occurring molecules which includes fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others.
  The whole of lipids is the lipidome.
  Lipids are broadly defined as any fat-soluble (lipophilic), naturally-occurring molecule. Lipids are usually defined as hydrophobic or amphipathic biological molecules that will dissolve in organic solvents such as benzene or (...)

• pyruvic acid
  22 October 2007

  pyruvate

• amino acids
  11 July 2003

  aminoacid

• hyaluronic acid
  5 February 2006

  Hyaluronan

• estrogens
  15 April 2005

  Estrogens are key regulators of growth, differentiation, and the physiological functions of a wide range of target tissues, including the male and female reproductive tracts, breast, and skeletal, nervous, cardiovascular, digestive and immune systems.
  The majority of these biological activities of estrogens are mediated through two genetically distinct receptors, ERalpha and ERbeta, which function as hormone-inducible transcription factors.
  Over the past decade, it has become increasingly (...)

• cholesterol
  14 November 2003

  Definition: Cholesterol is an essential sterol lipid component of eukaryotic plasma and organelle membranes. It is particularly abundant in the brain as a major constituent of myelin.
  Together with sphingolipids, cholesterol is enriched in membrane microdomains termed lipid rafts, which function in cholesterol transport, endocytosis and signal transduction.
  Extracellular transport of cholesterol is mediated by ApoE (APOE).
  Cellular cholesterol homeostasis is maintained through activation (...)

• human proteins
  4 June 2003

  Proteins are made of amino acids arranged in a linear chain and joined together by peptide bonds.
  Many proteins are the enzymes that catalyze the chemical reactions in metabolism. Other proteins have structural or mechanical functions, such as the proteins that form the cytoskeleton, a system of scaffolding that maintains the cell shape.
  Proteins are also important in cell signaling, immune responses, cell adhesion, active transport across membranes, and the cell cycle.
  Structure
  The (...)

• nucleic acid
  16 September 2003

  polynucleotides, nucleic acids

• methionine
  15 October 2003

  Definition: Methionine (abbreviated as Met or M) is an essential α-amino acid with the chemical formula HO2CCH(NH2)CH2CH2SCH3. This essential amino acid is classified as nonpolar. Together with cysteine, methionine is one of two sulfur-containing proteinogenic amino acids.
  Biosynthesis
  As an essential amino acid, methionine is not synthesized in humans, hence we must ingest methionine or methionine-containing proteins.
  In plants and microorganisms, methionine is synthesized via a pathway (...)

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