Molecules

Articles

• acetyl-CoA
  2 June 2004

  Acetyl CoA

• ceramide
  4 December 2003

  ceramides

• folate
  15 October 2003

  folic acid

• amino acids
  11 July 2003

  aminoacid

• 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 (...)

• 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 (...)

• heme
  6 October 2003

  A heme (or haem) is a prosthetic group that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin.
  Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic subunit; these are known as hemoproteins.
  Structure
  Function
  Members
  heme A
  Heme synthesis (porphyrin synthesis)
  The enzymatic process that produces heme is properly called porphyrin synthesis, as all the (...)

• superoxide
  4 February 2006

  02-, superoxyde anion, superoxyde

• hyaluronic acid
  5 February 2006

  Hyaluronan

• biomolecule
  4 June 2003

  biomolecules

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